enough; adequate 足够的,充足的 [as adj.]he had a small private income which was sufficient for her needs. 他有一小笔私人收入,这已经足够满足她的需求了。 [as determiner]they had sufficient resources to survive. 他们有足够的资源可供生存。
派生 sufficiently adverb 语源
Middle English (in the sense 'legally satisfactory'): from Old French, or from Latin sufficient- 'meeting the need of' (see suffice)