Meaning of SUFFICIENT in English
[suf.fi.cient] adj [ME, fr. L sufficient-, sufficiens, fr. prp. of sufficere] (14c) 1 a: enough to meet the needs of a situation or a proposed end "~ provisions for a month" b: being a sufficient condition
2. archaic: qualified, competent -- suf.fi.cient.ly adv syn sufficient, enough, adequate, competent mean being what is necessary or desirable. sufficient suggests a close meeting of a need "sufficient savings". enough is less exact in suggestion than sufficient "do you have enough food?". adequate may imply barely meeting a requirement "the service was adequate". competent suggests measuring up to all requirements without question or being adequately adapted to an end "had no competent notion of what was going on".
Merriam-Webster English vocab. Английский словарь Merriam Webster. 2012