unaccountable definition by Webster's New World
- that cannot be explained or accounted for; strange; mysterious
- not accountable; not responsible
unaccountable definition by American Heritage Dictionary
- Impossible to account for; inexplicable: unaccountable absences.
- Free from accountability; not responsible: an executive unaccountable to anyone but the president.
- unˌac·countˌa·bilˈi·ty noun
- unˌac·countˈa·bly adverb