Definition of trenchant adjective from the Oxford Advanced Learner's Dictionary

 

trenchant

 adjective
adjective
BrE BrE//ˈtrentʃənt//
 
; NAmE NAmE//ˈtrentʃənt//
 
(formal)
 
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(of criticism, remarks, etc.) expressed strongly and effectively, in a clear way synonym incisive His trenchant views on the subject are well known. Word Origin Middle English (referring to a weapon or tool with a sharp edge): from Old French, literally ‘cutting’, present participle of trenchier, based on Latin truncare ‘to maim’.
See the Oxford Advanced American Dictionary entry: trenchant