I use the word sweater myself but it doesn't bother me when anyone uses another word. I understand completely, provided the other person is talking about what I think he's talking about. But sometimes they don't know either.
To me, however, "a tank top" sounds like a female garment. If a man's undershirt doesn't have sleeves like a t-shirt, then it's an undershirt, not a tank top. Women do not generally wear undershirts. But I understand the British wear vests as an undergarment. Americans do not. European men wear slips, American women used to (haven't noticed any lately down South). For a while, in the early 1960s and perhaps earlier, pullover garments were often referred to as "popovers," a term I haven't seen used for that meaning for a long time.
I have heard the term singlet but I just thought that's what they used to wear under a doublet.
To me, however, "a tank top" sounds like a female garment. If a man's undershirt doesn't have sleeves like a t-shirt, then it's an undershirt, not a tank top. Women do not generally wear undershirts. But I understand the British wear vests as an undergarment. Americans do not. European men wear slips, American women used to (haven't noticed any lately down South). For a while, in the early 1960s and perhaps earlier, pullover garments were often referred to as "popovers," a term I haven't seen used for that meaning for a long time.
I have heard the term singlet but I just thought that's what they used to wear under a doublet.