/ ˌɪnsəˈfɪʃnt; NAmE / adjective
insufficient (to do sth) | insufficient (for sth) not large, strong or important enough for a particular purpose
SYN inadequate :
insufficient time
His salary is insufficient to meet his needs.
OPP sufficient
► in·suf·fi·cient·ly adverb
► in·suf·fi·ciency / -ʃənsi; NAmE / noun [ U , sing. ] (usually technical ):
cardiac insufficiency
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WORD ORIGIN
late Middle English (in the sense incapable, incompetent ): via Old French from late Latin insufficient- not sufficing, from in- not + Latin sufficere put under, meet the need of (from sub- under + facere make).