したくない (translations)→ hate unable
なつかしさ (translations)→ emotion fondness nostalgia
悔恨 (translations)→ curse remorse
気にする (translations)→ attention bother care concern count disturb fret matter mind protective put study worry
後悔 (translations)→ grief penance rue ruth terrible
残念 (translations)→ bummer hard sad
心苦しい (translations)→ repugnant sorry
心配 (translations)→ angst anxiously apprehension danger distress fear perturbation scared wish worried
惜しい (translations)→ good shame tough valuable
嘆く (translations)→ deplore disapprove
未練 (translations)→ affection reluctance