動詞 perplex:

1. be a mystery or bewildering to
   同義詞：perplex, vex, stick, get, puzzle, mystify, baffle, beat, pose, bewilder, flummox, stupefy, nonplus, gravel, amaze, dumbfound
2. make more complicated
   同義詞：complicate, perplex

形容詞 perplexed:

1. full or difficulty or confusion or bewilderment

1. We were perplexed by his failure to answer the letter.
   他何以不覆信，我們大惑不解。
2. The question perplexed me.
   那問題把我難住了。
3. Faced with that dilemma, he was perplexed.
   他面對進(jìn)退兩難的局面，不知如何是好。
4. When new math was introduced into schools, many parents were perplexed by it.
   當(dāng)學(xué)校開設(shè)新的數(shù)學(xué)課時，許多家長對此感到迷惑不解。

per.plexed

adj.（形容詞）
Filled with confusion or bewilderment; puzzled.
困惑的，費(fèi)解的：充滿困惑或昏亂的；令人費(fèi)解的
Full of complications or difficulty; involved.
復(fù)雜的，雜亂的，難辦的：充滿抱怨或困難的；復(fù)雜的

來源：
Middle English
中古英語
from perplex [confused]
源自 perplex [混亂的]
from Old French perplexe
源自 古法語 perplexe
from Latin perplexus
源自 拉丁語 perplexus
per- [per-]
per- [前綴，表示.通過，完全.等意]
plexus [past participle of] plectere [to entwine] * see plek-
plexus [] plectere的過去分詞 [纏住，盤繞，糾纏] *參見 plek-

【引伸】
perplex.edly