請問一件連身泳衣嘅英文係咩??十萬火急....

According to the Oxford Learner's wordfinder dictionary, a piece of clothing that a woman wears to go swimming is : a swimsuit or a swimming costume.

連 身 泳 衣: sWiMsUiT

one piece swimming suit

swiming suit係泳衣
所以連身泳衣係all in one swim suit