lock·up 
(lŏkŭp′)
(lŏkŭp′)n.
1. Informal A jail, especially one in which offenders are held while awaiting a court hearing.
2.
a. The act or an instance of locking.
b. The state of being locked.
- unexceptionable
- unexceptionably
- unexceptional
- unexceptionally
- unexpected
- unexpectedly
- unexpectedness
- unexploited
- unexpressed
- unexpressive
- unexpressively
- unexpressiveness
- unfading
- unfadingly
- unfailing
- unfailingly
- unfair
- unfairly
- unfairness
- unfaith
- unfaithful
- unfaithfully
- unfaithfulness
- unfamiliar
- unfamiliarity