mono
monolingual
word that means "the act of joining into one"
union
word that means "happening every two weeks"
biweekly
word that means "a shape with three angles"
triangle
word that means "a train on one rail"
monorail
word that means "animal with one horn"
unicorn
word that means "cycle with two wheels"
bicycle
word that means "a group of three" or "three babies born at the same time"
triplet
a word that means "a black and white photo" or "one color"
monochrome
word that means "cycle with one wheel"
unicycle
word that means "a tool you look through with two eyes or lenses"
binoculars
a word that means "cycle with three wheels"
tricycle
a word that means "one lens"
monocle
word that means "speaks two languages"
bilingual
a word that means "speaks three languages"
trilingual