singlet

n (Brit) (a) man's sleeveless garment worn under or instead of a shirt; vest 男用无袖汗衫; 背心. (b) such a garment worn by runners, athletes, etc 无袖运动衫.

since, sincere, sincerely, sincerity, sine, sine die, sine qua non, sinecure, sinew, sinewy, sinful, sinfully, sing, Singapore, singe, singer, singing, single, single out, single-minded, singsong, singular, singularity, singularly, sinister, sink, sink in, sinker, sinkhole, sinking, sinking fund, sinlessness, sinner, Sino- (also sino-), sinologist, sinology, sinuosity, sinuous, sinus, sinusitis,