Indispensable - Definition
indispensable
adj 1: not to be dispensed with; essential; "foods indispensable
to good nutrition" [ant: dispensable]
2: absolutely necessary; vitally necessary; "essential tools and
materials"; "funds essential to the completion of the
project"; "an indispensable worker" [syn: essential,
indispensable]
3: unavoidable; "the routine but indispensable ceremonies of
state"