half
semicircle
forming words, with the meanings:
half of
semicircle
occurring halfway through or twice within a specified period of time: compare bi-1
semiannual
semicentenary
to some extent or; partly; incompletely
semiconscious
semidarkness
semicivilized
semi-independent
partial; incomplete
semiconsciousness
semidarkness
having some of the characteristics of
semimetal
quasi
semijudicial
[Middle English from Latin semi- half]