source: [NEW GAME!の飯島ゆんがお肌を触るGIF画像｜無料GIF画像検索 GIFMAGAZINE 974137]

the part of the human body below the ribs and above the hips.

〖しばしばone's ～〗 腰(のくびれ), ウエスト (!胴の細くなっている部分で, 日本語の「腰」の上部; → hip1)

the circumference of a person's waist:

e.g. her waist is 28 inches.

a narrowing of the trunk of the body above the hips:

e.g. the last time you had a waist was around 1978.

the part of a garment encircling or covering the waist.

(衣服の)ウエスト

the point at which a garment is shaped so as to narrow between the rib cage and the hips:

e.g. a jacket with a high waist.

US a blouse or bodice.

｟米｠ (婦人の)ブラウス

a narrow part in the middle of anything, such as a violin, an hourglass, the body of wasp, etc.

(弦楽器などの)中央部のくびれ; (ハチなどの)胸と胴の間のくびれ.

the middle part of a ship, between the forecastle and the quarterdeck.

(飛行機の)胴体中央部; 〘海〙 (船の)中央部上甲板

waisted | ˈwāstid | adjective

in combination : high-waisted

waistless adjective

late Middle English: apparently representing an Old English word from the Germanic root of wax2.