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次第に, しだいに
1. gradually, by degrees, little by little, bit by bit
逐渐,一点点
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治まる, おさまる
1. to die down (storm, anger, conflict, etc.), to calm down, to cool off, to abate, to be settled, to be brought under control
2. to be at peace, to be governed well
3. to subside (of pain, symptoms, etc.), to be alleviated, to get better, to ease of...
tbd