: not contaminated, spoiled, or affected slightly with something bad : not tainted untainted evidence an untainted reputation.

What is the root word of untainted?

1570s, "to corrupt, contaminate," also "to touch, tinge, imbue slightly" (1590s), from Middle English teynten "to convict, prove guilty" (late 14c.), which is partly from Old French.

What means Scepticism?

1 : an attitude of doubt or a disposition to incredulity either in general or toward a particular object. 2a : the doctrine that true knowledge or knowledge in a particular area is uncertain. b : the method of suspended judgment, systematic doubt, or criticism characteristic of skeptics.