形容詞 inept:

1. not elegant or graceful in expression
   同義詞：awkward, clumsy, cumbersome, inapt, ill-chosen
2. generally incompetent and ineffectual
   同義詞：feckless
3. revealing lack of perceptiveness or judgment or finesse
   同義詞：tactless

1. Not competent or skillful; inept.
   無能的沒能力的或不熟練的; 笨拙的
2. I've never heard anyone so inept at making speeches.
   我從未聽說過有這樣不會講話的人。
3. His inept handling of a minor problem turned it into a major crisis.
   他處理不善使小事變大了。

in.ept

adj.（形容詞）
Not apt or fitting; inappropriate.See Synonyms at awkward
不合適的：不恰當?shù)幕虿缓线m的；不合宜的參見 awkward

Displaying a lack of judgment, sense, or reason; foolish:
愚蠢的：表現(xiàn)出缺乏判斷力、理性或理智的；笨的：
例句：
an inept remark.
一個愚蠢的評價

Bungling or clumsy; incompetent:
笨拙的：毛手毛腳的；無能的：
例句：
inept handling of the account.
笨拙地處理帳目

來源：
Latin ineptus
拉丁語 ineptus
in- [not] * see in-
in- [不] *參見 in-
aptus [suitable] * see apt
aptus [合適] *參見 apt

【引伸】
inept.ly
adv.（副詞）
inept.ness 或
inep.titude.