This is the 6068th most frequent Japanese word.
ウエスト
"ウエスト" means "waist" in English.
ウエスト refers to the physical measure of a person's waist in this context.
彼女のウエストは細いですね。
Her waist is slim, isn't it?
ウエスト signifies the waist measurement of an article of clothing here.
このズボンのウエストは緩すぎる。
The waist of these pants is too loose.
ウエスト speaks to the fit or adjustment of clothing at the waist in this case.