1. 尖刻的：trenchancy 锐利 | trenchant 尖刻的 | trencher cap 学士帽

2. 清晰的：scant 缺乏的 | trenchant 清晰的 | trepidation 颤抖

3. 一针见血：transparent透明的a | trenchant一针见血d | trench壕沟

4. (古诗)锐利的,尖刻的：Veiled 隐藏的 | Trenchant (古诗)锐利的,尖刻的 | Lenient 宽厚的,怜悯的

1. （批评、评论等）鲜明的，犀利的，尖锐的，中肯的
You can use trenchant to describe something such as a criticism or comment that is very clear, effective, and forceful.

e.g. He was shattered and bewildered by this trenchant criticism...
他因这番尖锐的批评而万念俱灰，茫然不知所措。
e.g. His comment was trenchant and perceptive.
他的评论既一针见血又鞭辟入里。

adj

1. clearly or sharply defined to the mind

e.g. clear-cut evidence of tampering
Claudius was the first to invade Britain with distinct...intentions of conquest
trenchant distinctions between right and wrong

Synonym: clear-cutdistinct

2. characterized by or full of force and vigor

e.g. a hard-hitting expose
a trenchant argument

Synonym: hard-hitting

3. having keenness and forcefulness and penetration in thought, expression, or intellect

e.g. searching insights
trenchant criticism

Synonym: searching