I-adjective (keiyoushi)
wasteful; a waste
Usually written using kana alone
とてもいい天気だから家の中にいるのがもったいない。It's too sunny to stay inside. too good; more than one deserves; unworthy of
Usually written using kana alone
impious; profane; sacrilegious
Usually written using kana alone
Also written 勿体無い【もったいない】