insufficient

US /ˌɪn.səˈfɪʃ.ənt/

UK /ˌɪn.səˈfɪʃ.ənt/

1.

not enough; inadequate

:

•

There was insufficient evidence to convict him.

•

The food supply was insufficient for the growing population.

:

inadequate deficient scarce meager scant

:

sufficient adequate enough

:

insufficiency