I. “+ adjective
1. : not to be accounted for : inexplicable
perceptible only as unaccountable influences that distort and hinder progress — C.H.Rickword
gave her an unaccountable thrill of pleasure — G.B.Shaw
especially : not consonant with reason or rule : strange , mysterious
2. : not accountable or responsible : free from control
the power of management has been aggrandized and left largely exempt and unaccountable — G.B.Hurff
• un·ac·count·able·ness noun -es
• un·accountably “+ adverb
II. “+ noun
: a person or thing that is unaccountable