TRENCHANTLY
trenchantly
(adverb) in a vigorous and effective manner; “he defended his client’s civil rights trenchantly”
Source: WordNet® 3.1
Etymology
Adverb
trenchantly (comparative more trenchantly, superlative most trenchantly)
In a trenchant manner.
Source: Wiktionary
Trench"ant*ly, adv.
Definition: In a trenchant, or sharp, manner; sharply; severely.
TRENCHANT
Trench"ant, a. Etym: [OF. trenchant, F. tranchant, p. pr. See Trench,
v. t.]
1. Fitted to trench or cut; gutting; sharp. " Trenchant was the
blade." Chaucer.
2. Fig.: Keen; biting; severe; as, trenchant wit.
Source: Webster’s Unabridged Dictionary 1913 Edition