ichidan verb, intransitive verb
put on moderate, firm weight; gain healthy weight (e.g. muscle); become overweight but not obese
Describes weight gain that is solid or firm, not flabby; often implies a healthy or moderate increase in body mass. The word is rare and may be encountered in older or specialized contexts.
最近、運動を始めたら、かたごえてきた気がする。
Lately, since I started exercising, I feel like I've put on some firm weight.
彼
He has gained some solid weight compared to before, but he is not obese.