Denshi Jisho — Online Japanese dictionary

Couldn't find anything for 痩せ細る~, so trying 痩せる instead.

痩せる やせる 1: (Usually written using kana alone) to become thin; to lose weight; to reduce (one's) weight; to slim;
2: to be barren; to be infertile; to be sterile
Common word, Ichidan verb, Intransitive verb 

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