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Sentence

彼かれは不ふ確たしかな約やく束そくをよくする。

Span Details

不ふ確たしか

uncertain; unreliable; unclear

na-adjective, noun

adnominal form of the copula (after a na-adjective or noun)

約やく束そく

promise; agreement; one's word; contract

noun, suru verb

よくする。

improve; make better; do often; frequently do; treat well; be kind to