Antonyms of adj insufficient

1 sense of insufficient

Sense 1
insufficient (vs. sufficient), deficient -- (of a quantity not able to fulfill a need or requirement; "insufficient funds")

sufficient (vs. insufficient) -- (of a quantity that can fulfill a need or requirement but without being abundant; "sufficient food")
        => adequate, decent, enough -- (sufficient for the purpose; "an adequate income"; "the food was adequate"; "a decent wage"; "enough food"; "food enough")
        => comfortable -- (sufficient to provide comfort; "a comfortable salary")

Similarity of adj insufficient

1 sense of insufficient

Sense 1
insufficient (vs. sufficient), deficient -- (of a quantity not able to fulfill a need or requirement; "insufficient funds")
       => depleted, low -- (no longer sufficient; "supplies are low"; "our funds are depleted")
       => inadequate, poor, short -- (not sufficient to meet a need; "an inadequate income"; "a poor salary"; "money is short"; "on short rations"; "food is in short supply"; "short on experience")
       => lean, skimpy -- (containing little excess; "a lean budget"; "a skimpy allowance")
       => light, scant (predicate), short -- (less than the correct or legal or full amount often deliberately so; "a light pound"; "a scant cup of sugar"; "regularly gives short weight")
       => shy (predicate) -- (short; "eleven is one shy of a dozen")
          Also See-> meager#1, meagre#1, meagerly#1, stingy#2, scrimpy#1