bright·en 
(brītn)
(brītn)tr. & intr.v. bright·ened, bright·en·ing, bright·ens
To make or become bright or brighter.
brighten·er n.
- semiglossy
- semigroup
- semihard
- semiheavy water
- semi-independent
- semi-infinite
- semiliquid
- semiliquidity
- semiliteracy
- semiliterate
- Semillon
- semilog
- semilogarithmic
- semilunar
- semilunar bone
- semilunar cartilage
- semilunar valve
- semilunate
- semimembranous
- semimonthly
- seminal
- seminal duct
- seminal fluid
- seminally
- seminal vesicle