うっかり (translations)→ absentmindedly accident accidentally carelessly fear heedlessly inadvertent inadvertently injudiciously let nearly thoughtlessly uncertainly unguardedly unintentional unthinkingly venture
かまわない (translations)→ forget happy ignore leave should
さりげなく (translations)→ absently casual casually casualness covert covertly delicately discreet discreetly effortlessly everyday inconspicuous innocently matter-of-factly nonchalantly restrained simply unobtrusively unselfconsciously vague
のんきな (translations)→ breezy laid-back negligent pleasant
トンマな (translations)→ dopey dumb
迂闊 (translations)→ blundering forgetfulness ignorance lapse stupidity
投げやりな (translations)→ slovenly uneager
不注意な (translations)→ improvident inattentive incurious unheedful unheeding unmindful
放埒な (translations)→ sportive untidy
無神経 (translations)→ blunt callous clod insensibility insensitive tactless unconcern unpolished
無造作に (translations)→ easily just loosely offhandedly unceremoniously