Na-adjective (keiyodoshi), Noun, Adverb (fukushi), Adverb taking the 'to' particle
thoughtless; reckless; rash; indiscriminate; indiscreet
Usually written using kana alone
excessive; unreasonable; immoderate; absurd
Usually written using kana alone
Also written 無闇矢鱈【むやみやたら】