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.
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All 27,237 words
153 words
inflammable
C2
/ɪnˈflæməbəl/
easily set on fire; flammable
unwary
C2
/ənˈwɛri/
not alert to danger or deception
forewarn
C1
/fɔrˈwɔrn/
to warn someone about a danger, problem, or event before it occurs
overexposure
C2
/ˌoʊ.vɚ.ɪkˈspoʊ.ʒɚ/
excessive exposure to something, especially something harmful such as radiation or sunlight
lethality
C1
/liˈθæləti/
the capacity or quality of being able to cause death
extrication
C1
/ˌɛkstɹɪˈkeɪʃən/
the act or process of freeing someone or something from entanglement, confinement, or a difficult situation
imperil
C2
/ɪmˈper.əl/
formal: to put a person, thing, or undertaking at serious risk of harm, loss, or destruction
incautious
C2
/ɪnˈkɑʃəs/
not sufficiently cautious; acting or speaking without proper care
watchout
C2+
/ˈwɑtʃˌaʊt/
the act or state of keeping watch for danger, trouble, or something expected
tocsin
C2
/ˈtɑksɪn/
a bell or bell signal sounded to warn people of danger
overstrain
C1
/ˌoʊ.vɚˈstreɪn/
to subject a person, body part, resource, or ability to more strain than it can safely bear
premonitory
C2
/prəˈmɑnəˌtɔri/
serving as an advance warning or indication of something that is about to happen
insecurely
C1
In a way that shows a lack of self-confidence.
detrimentally
C1
In a way that causes harm or damage.
calamitously
C2
In a way that causes great damage or disaster.
impend
C2
/ɪmˈpɛnd/
to be imminent or about to happen, especially as a threat or danger
peril
C2+
/ˈpɛrəl/
serious and immediate danger; to imperil
deleterious
C2+
/ˌdɛləˈtɪriəs/
causing harm or damage, especially gradually
innocuous
C2+
/ɪˈnɑkjuəs/
not harmful or offensive; harmless
injurious
C2+
/ɪnˈdʒʊriəs/
causing or likely to cause harm or damage
mishap
C2+
/ˈmɪsˌhæp/
an unlucky accident, usually minor
admonition
C2+
/ˌædməˈnɪʃən/
a gentle but earnest warning or rebuke
nocuous
C2+
/ˈnɑkjuəs/
harmful, noxious, or poisonous
overreach
C2+
/ˌoʊvərˈritʃ/
to extend or exert oneself beyond a safe or proper limit
perilous
C2+
/ˈpɛrələs/
full of danger or risk
admonishment
C2+
/ædˈmɑnɪʃmənt/
a gentle or earnest reproof or warning
beshield
C2+
/bɪˈʃild/
to shield, protect, or cover as with a shield
dangersome
C2+
/ˈdeɪndʒɚsəm/
fraught with danger; perilous
disastrously
C2+
/dɪˈzæstrəsli/
in a way that causes great damage, ruin, or failure
imprudent
C2+
/ɪmˈprudənt/
lacking caution or foresight; unwise
jeopardy
C2+
/ˈdʒɛpərdi/
danger of loss, harm, or failure; legal risk of conviction
mischance
C2+
/mɪsˈtʃæns/
bad luck or an unfortunate accident
noxious
C2+
/ˈnɑkʃəs/
harmful, poisonous, or very unpleasant
poisonously
C2+
/ˈpɔɪzənəsli/
in a venomous or toxically harmful manner
polluted
C2+
/pəˈlutɪd/
contaminated with harmful or unclean substances
undamaging
C2+
/ʌnˈdæmɪdʒɪŋ/
not causing damage or harm
wreak
C2+
/riːk/
to cause or inflict (harm, damage, or vengeance)
admonitory
C2+
/ədˈmɑnɪˌtɔri/
giving or conveying a warning or gentle reproof
beware
C2+
/bɪˈwɛr/
to be cautious or on guard against a danger
bogeyman
C2+
/ˈboʊɡimæn/
an imaginary evil spirit invoked to frighten children; a dreaded threat
cautiously
C2+
/ˈkɔʃəsli/
in a careful manner that avoids danger or risk
convoy
C2+
/ˈkɑnvɔɪ/
a group of vehicles or ships travelling together for protection
inadvertently
C2+
/ˌɪnədˈvɝtəntli/
without intention; by accident
incaution
C2+
/ɪnˈkɔʃən/
lack of caution; carelessness
indemnity
C2+
/ɪnˈdɛmnəti/
security or protection against loss, or compensation for it
jeopardous
C2+
/ˈdʒɛpərdəs/
full of danger or risk; perilous
parlous
C2+
/ˈpɑrləs/
full of danger or uncertainty; perilous
portend
C2+
/pɔrˈtɛnd/
to be a sign or warning that something, usually momentous, is likely to happen
rampant
C2+
/ˈræmpənt/
flourishing or spreading unchecked, especially of something harmful
regenerate
C2+
/rɪˈdʒɛnəˌreɪt/
to regrow, restore, or renew, especially after damage
scathe
C2+
/skeɪð/
to harm or injure, especially by scorching; harm or damage
secureness
C2+
/sɪˈkjʊrnəs/
the state or quality of being secure, safe, or firmly fixed
sully
C2+
/ˈsʌli/
to damage or tarnish the purity or reputation of something
threateningly
C2+
/ˈθrɛtənɪŋli/
in a manner that suggests danger or harm
unhazardous
C2+
/ʌnˈhæzərdəs/
not dangerous; safe
pernicious
C1
/pɚˈnɪʃəs/
having a harmful effect, especially in a gradual or subtle way
averter
C2
/əˈvɝtɚ/
a person, power, or thing that prevents or turns away danger, harm, or another unwanted event