insufficient

 
Pronunciation: /ɪnsəˈfɪʃ(ə)nt/

adjective

  • not enough; inadequate: there was insufficient evidence to convict him

Derivatives

insufficiently

adverb

Origin:

late Middle English (in the sense 'incapable, incompetent'): via Old French from late Latin insufficient- 'not sufficing', from in- 'not' + Latin sufficere (see suffice)