BLENCH, verb intransitive [This evidently is the blanch of Bacon [see Blanch.] and perhaps the modern flinch.] To shrink; to start back to give way. BLENCH, verb transitive To hinder or obstruct, says Johnson. But the etymology explains the passage he cites in a different manner. 'The rebels carried great trusses of hay before them, to blench the defendants' fight.' That is, to render the combat blank; to render it ineffectual; to break the force of the attack; to deaden the shot. BLENCH, noun A start.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI