A tankini is a two-piece swimming outfit for women: a bikini bottom worn with a vest-style top that covers the stomach and back. The top has no sleeves, and it usually hangs down to the waist or the hip. People choose a tankini when they want the comfort of two pieces — easy to take off in the toilet, easy to mix sizes — but do not want to show their middle. It is very common at hotel pools, at swimming lessons, and with women who feel a bikini is too little and a one-piece is too much trouble. The word is written the way it sounds and is not formal at all; you will meet it in shops and clothing websites rather than in books. How much it covers varies a lot: some tankini tops end just above the belly button, others go past the hips almost like a short dress.

坦基尼泳裝（背心式兩件式泳衣）。店裡跟網拍上多半直接講英文 tankini，或說「背心式兩件式泳衣」。不要跟「比基尼」混著講——比基尼露肚子，坦基尼上半身像小背心，肚子是遮住的。