bi- — two, twice, double (affix)
Used in (4)
bicycle
A1
/ˈbaɪsɪk(ə)l/
A vehicle with two wheels that you ride by pushing pedals with your feet.
M
S
bilingual
B1
/baɪˈlɪŋ.ɡwəl/
Able to speak two languages well.
M
S
bisect
C2+
/baɪˈsɛkt/
to divide into two equal parts
M
S
binary
C2+
/ˈbaɪnɛri/
relating to or composed of two things or states, especially the base-2 number system
M
S