Below are possible answers for the crossword clue Not optional.
6 letter answer(s) to not optional
have need of; "This piano wants the attention of a competent tuner"
have or feel a need for; "always needing friends and money"
require as useful, just, or proper; "It takes nerve to do what she did"; "success usually requires hard work"; "This job asks a lot of patience and skill"; "This position demands a lot of personal sacrifice"; "This dinner calls for a spectacular dessert"; "This intervention does not postulate a patient's consent"
necessary for relief or supply; "provided them with all things needful"
Other crossword clues with similar answers to 'Not optional'