Other forms: taints
A taint is a trace of something bad that spoils the whole. A taint of corruption, without taint, tainted evidence.
The point is that a very small amount ruins everything: tainted evidence is unusable however good the rest of the case is. As a verb it is commoner than the noun. It comes from the same root as tint, and the image is of a dye spreading through cloth.
1nountaintA trace of something bad that spoils the whole.
“The scandal left a taint on his name that never fully disappeared.”
taint is a trace.
Old French teint means dyed, from Latin tingere, to dye or tinge. Tint is the same root.
Proto-Indo-European
*teng-
Latin
tinctum
Old French
teint
Middle French
teint
English, today
taint
Built from
From Middle French teint, from Old French teint (past participle of teindre (“to dye, to tinge”)), from Latin tinctum (past participle of tingere); compare tint.
Etymology from Wiktionary, CC BY-SA