足たりないConjugationsMeaningsI-adjective1. insufficient; not enough; lacking2. dim-witted; slow; stupidKanji used足footExamples2寝ねが足たりないので、今日きょうは早はやめに寝ねます。Because of my lack of sleep I'm going to bed early tonight.僕ぼくは寝ねが足たりない。I don't get enough sleep.