insufficient

形容词 insufficient:

1. of a quantity not able to fulfill a need or requirement
   同义词：deficient

1. Our wood supply proved insufficient.
   我们的木材供应证明是不够的。
2. His children were dwarfed by insufficient food.
   他的儿女因营养不良而发育不全。
3. A bank check drawn on insufficient funds to take advantage of the time interval required for collection.
   通融票据利用筹款需要的时间间隔开出不足的资金的银行支票

in.suf.fi.cient

adj.（形容词）
Not sufficient; inadequate.
不足；不充分的

【引伸】
in.suffi.ciently
adv.（副词）