gaining weightLiterally, “weight has increased.” This is the て-form of 体重が増える and often connects to いる or くる: 体重が増えている means “has gained weight” or “is gaining weight,” while 体重が増えてきた means “has started gaining weight” or “has been gaining weight.”
JA: 最近、運動不足で体重が増えてきた。
EN: I've been gaining weight recently because I haven't been exercising enough.