Noun which may take the genitive case particle 'no', Na-adjective (keiyodoshi), Noun
unhurt; uninjured; unwounded; unscathed; unharmed
flawless (e.g. gem); unblemished; undamaged; perfect (condition)
spotless (e.g. reputation); faultless (e.g. performance); perfect (record); without failure; without defeat
Also written 無疵【むきず】