English Vocabulary
Pick a CEFR level (A1–C2) — A1 is the friendliest place to start — and browse its words grouped by topic: travel, food, the body, emotions, and more. Each word shows its meaning, example sentences, and US/UK pronunciation.
Choose your level
All 27,237 words
519 words
exponentiation
C2
/ˌek.spoʊˌnen.ʃiˈeɪ.ʃən/
the mathematical operation of raising a base to a power specified by an exponent
agio
C2
/ˈæ.d͡ʒoʊ/
The premium or percentage on a better sort of money when it is given in exchange for an inferior sort. The premium or discount on foreign bills of exchange is sometimes called agio.
congruence
C2
/ˈkɑŋɡruəns/
agreement, correspondence, or consistency between things
triadic
C2
/traɪˈædɪk/
consisting of three elements or involving a three-place relation
dimorphism
C2
/daɪˈmɔrfɪzəm/
The occurrence in an animal species of two distinct types of individual.
affine
C2
/əˈfaɪn/
Of or pertaining to a function expressible as f(⃑x)=A⃑x+⃑b (where A is a linear transformation and ⃑b is a constant), which, regarded as a transformation, maps parallel lines to parallel lines and finite points to finite points.
finitely
C2
/ˈfaiːnaiʔ.li/
with a finite limit
kilovolt
C2
/ˈkɪləˌvoʊlt/
one thousand volts. Symbol: kV or KV.
correlator
C2
/ˈkɔr.əˌleɪ.tɚ/
something that correlates two sets of things; in logic, a relation that pairs terms in one field with terms in another
ellipsoid
C2
/ɪˈlɪp.sɔɪd/
a surface whose plane sections are all ellipses or circles
incommensurable
C2
/ˌɪnkəˈmɛnʃɚəbəl/
in mathematics, lacking a shared unit that measures each quantity exactly; having an irrational ratio
arithmetician
C2
/əˌɹɪθməˈtɪʃən/
a person who is skilled in or specializes in arithmetic
multiplicative
C2
/ˈmʌltɪplɪˌkeɪtɪv/
tending or having the power to multiply or increase in number or quantity or degree
transfinite
C2
/tɹænsˈfaɪnaɪt/
A transfinite number.
approximator
C2
/əˈprɑksəˌmeɪtɚ/
a person, method, or device that produces an approximate value or representation
nonmathematical
C2
/ˌnɑːnˌmæθəˈmætɪkəl/
not involving, expressed in, or based on mathematics
unmathematical
C2+
/ˌʌnˌmæθ.əˈmæt.ɪ.kəl/
not expressed, reasoned, or carried out according to mathematics
indemonstrable
C2
/ˌɪndɪˈmɑnstrəbəl/
incapable of being demonstrated, proved, or established by an argument
modius
C2
/ˈmoʊdiəs/
an ancient Roman dry measure, especially for grain, equal to about 8.7 liters or 0.96 imperial peck
quadrate
C2
/ˈkwɑːdreɪt/
to agree, correspond, or fit exactly with something
equiangular
C2
/ˌiːkwiˈæŋɡjələr/
having all its angles equal, or having corresponding angles equal
contravariant
C2
/ˌkɑntrəˈvɛriənt/
transforming in an opposite or reverse way under a change of coordinates or type relation
commensurable
C2
/kəˈmɛnʃɚəbəl/
in mathematics, measurable by the same unit without a fractional remainder; having a rational ratio
perpendicularity
C2
/ˌpɝpənˌdɪkjuˈlɛrəti/
the state or relation of meeting a line or plane at a right angle
rhombic
C2
/ˈrɑmbɪk/
having the shape or characteristics of a rhombus, with four equal sides and opposite angles equal
pyrometer
C2
/paɪˈrɑmətər/
a thermometer designed to measure high temperatures
multipliable
C2+
/ˈmʌl.təˌplaɪ.ə.bəl/
capable of being multiplied or increased by multiplication
dimensionless
C2
/dɪˈmɛnʃənləs/
having no physical units or measurable dimensions
syllogize
C2+
/ˈsɪlədʒʌɪz/
reason by syllogisms
dimensionable
C2+
/dɪˈmɛnʃənəbəl/
capable of being measured, assigned dimensions, or described in dimensional terms
indivisibility
C2
/ˌɪndəˌvɪzəˈbɪləti/
the state or property of being incapable of division
congruent
C2+
/ˈkɑŋɡruənt/
in agreement or harmony; identical in form (geometry)
plumb
C2+
/plʌm/
to measure depth or to explore thoroughly; exactly vertical
berate
C2+
/bɪˈreɪt/
to scold or criticize angrily and at length
guillemet
C2+
/ˈɡiːjəmeɪ/
an angle-shaped quotation mark («» or ‹›) used in several European languages
pondering
C2+
/ˈpɑndərɪŋ/
the act of thinking about something carefully and at length
module
C2+
/ˈmɑdʒul/
a self-contained component or unit of a larger system
specialization
C2+
/ˌspɛʃələˈzeɪʃən/
the process of concentrating on a particular area or skill
counterbalance
C2+
/ˈkaʊntɚˌbæləns/
to offset by an opposing weight or force
en
C2+
/ɛn/
a unit of measurement in typography equal to half an em
enormity
C2+
/ɪˈnɔrməti/
the great or extreme scale of something, especially of wickedness
foreshorten
C2+
/fɔrˈʃɔrtən/
to depict an object as shorter to suggest depth or perspective
variance
C2+
/ˈvɛriəns/
the fact of differing or disagreeing; a measure of spread in statistics
barleycorn
C2+
/ˈbɑrliˌkɔrn/
a grain of barley; an old unit of length equal to one third of an inch
bu
C2+
/bu/
a former Japanese unit of length or coinage
candela
C2+
/kænˈdɛlə/
the SI unit of luminous intensity
imperial
C2+
/ɪmˈpɪriəl/
relating to an empire or emperor; majestic in scale or bearing
lofty
C2+
/ˈlɔfti/
of great height; noble in sentiment, or haughty
outbalance
C2+
/ˌaʊtˈbæləns/
to outweigh or exceed in weight, value, or importance
periphery
C2+
/pəˈrɪfəri/
the outer edge or boundary of an area or group
wasteland
C2+
/ˈweɪstlænd/
a barren or desolate area of land
avoirdupois
C2+
/ˌævɚdəˈpɔɪz/
the system of weights based on a sixteen-ounce pound; informally, bodily weight
braid
C2+
/breɪd/
a length of interwoven strands; to weave such strands together
coil
C2+
/kɔɪl/
a length of something wound into rings; to wind into such loops
counterweight
C2+
/ˈkaʊntɚˌweɪt/
a weight that balances another force or load
crotch
C2+
/krɑtʃ/
the angle where the legs or two branches fork apart
denomination
C2+
/dɪˌnɑmɪˈneɪʃən/
a recognized branch of a religion, or a unit of monetary value
duple
C2+
/ˈdupəl/
consisting of two parts, especially having two beats per measure
ellipse
C2+
/ɪˈlɪps/
a regular oval closed curve, a flattened circle
evolute
C2+
/ˈɛvəˌlut/
in geometry, the locus of the centers of curvature of a curve
gauge
C2+
/ɡeɪdʒ/
an instrument for measuring; to estimate or measure
geepound
C2+
/ˈdʒiːpaʊnd/
a unit of mass; the slug, equal to about 32.2 pounds
heft
C2+
/hɛft/
weight or heaviness; to lift or test the weight of something
lengthful
C2+
/ˈlɛŋkθfəl/
having considerable length; lengthy
mensuration
C2+
/ˌmɛnʃəˈreɪʃən/
the measurement of lengths, areas, and volumes
meridian
C2+
/məˈrɪdiən/
a great circle of longitude; or the point of highest development
mi
C2+
/mi/
the third note of a major scale in the tonic sol-fa system
mil
C2+
/mɪl/
a unit of length equal to one thousandth of an inch
modulus
C2+
/ˈmɑdʒələs/
a numerical measure of a physical property, or the remainder in arithmetic
multiplication
C2+
/ˌmʌltəpləˈkeɪʃən/
the process of increasing in number, or the arithmetic operation
overpoise
C2+
/ˌoʊvɚˈpɔɪz/
to outweigh or counterbalance; a preponderance of weight
preponderate
C2+
/prɪˈpɑndəˌreɪt/
to be greater in number, weight, or influence; to predominate
quart
C2+
/kwɔrt/
a unit of liquid measure equal to two pints
stadion
C2+
/ˈsteɪdiən/
an ancient Greek unit of length, or a classical running track
subsidence
C2+
/səbˈsaɪdns/
the gradual caving in or sinking of an area of land
territorial
C2+
/ˌtɛrəˈtɔriəl/
relating to the ownership or defence of a particular area of land
voluble
C2+
/ˈvɑljəbəl/
speaking fluently, readily, or at great length
woodland
C2+
/ˈwʊd.lənd/
land covered with trees; a wooded area
clove
B1
/kloʊv/
a dried flower bud used as a spice, known for its aromatic and pungent flavor
atomicity
C2+
/ˌætəˈmɪsɪti/
The number of atoms in a molecule.
ocellus
C2+
/əʊˈsɛləs/
an eyelike marking (as on the wings of some butterflies)
dyadic
C2+
/daɪˈæ.dɪk/
Pertaining to a dyad, the number two; of two parts or elements.
co-punctual
C2+
/ˌkoʊˈpʌŋktʃuəl/
occupying or associated with the same point, especially in a technical spatial or temporal analysis
co-punctuality
C2+
/ˌkoʊˌpʌŋktʃuˈæləti/
the state of being co-punctual or sharing the same point in a technical ordering
one-one
C2+
/ˈwʌnˈwʌn/
mapping each element of one set to exactly one distinct element of another set
many-one
C2+
/ˈmɛniˈwʌn/
mapping many possible inputs to one output
one-many
C2+
/ˈwʌnˈmɛni/
relating one item to many items
non-Euclidean
C2
/ˌnɑn juˈklɪdiən/
not based on Euclidean geometry, especially geometry in which Euclid's parallel postulate does not hold
relation-number
C2+
/rɪˈleɪʃənˌnʌmbər/
a number-like abstraction associated with a relation in mathematical logic
arithmetical
C1
/ˌærɪθˈmɛtɪkəl/
relating to arithmetic or numerical calculation
commutative
C2
/kəˈmjutətɪv/
having the property that changing the order of operands does not change the result
collinearity
C2
/kəˌlɪniˈærəti/
the condition of lying on the same straight line
well-ordered
C2
/ˌwɛlˈɔrdərd/
arranged according to a clear order; in mathematics, ordered so every nonempty subset has a first element
covariance
C2
/koʊˈvɛriəns/
the way two quantities vary together; in mathematics and statistics, a measure or transformation property of such variation
contravariance
C2
/ˌkɑntrəˈvɛriəns/
opposite-direction variation or transformation, especially in tensors, category theory, or type systems
four-dimensional
C2
/ˌfɔr dəˈmɛnʃənəl/
having or involving four dimensions, especially three spatial dimensions plus time