Monday，2026.07.13

New words：

sufficient /səˈfɪʃnt/ adj. 足够的；充足的

详细词源拆解：

词根 suf-（在下，充分）+ fic（做）+ 形容词后缀 -ent
本义 “做得足够到位的”，指数量、程度能够满足需求，书面正式用词。

必记高频搭配

sufficient for sth 足够应付某物

The water here is sufficient for our daily use.

sufficient to do sth 足以做某事

This money is sufficient to buy a new schoolbag.

sufficiently (adv. 充分地)

He is sufficiently prepared for the coming exam.

sufficiency (n. 充足)

We have a sufficiency of books for reading.

关键使用提醒

1. 固定搭配两种结构：

   ① sufficient + 名词 + for sth
   ② sufficient + 名词 + to do sth

2. 语气区分：sufficient > enough，作文书面替换 enough 提升档次

   反义词：insufficient adj. 不足的，不够的
   Insufficient rest will make you tired easily.
   休息不足会让你很容易疲惫。

3. 副词 sufficiently 修饰形容词、动词，置于被修饰词前

   She is sufficiently brave to speak in public.
   她足够勇敢，敢于当众发言。