A threesome is a group of three people, or sometimes three things, doing something together. The plain meaning is completely innocent: three golfers playing a round, three friends who always sit together, three singers in a group. Sport — golf especially — is where the word is most at home.

A threesome threesome is指的是 a group of three people, or sometimes three things三個人，有時候是三樣東西, doing something together一起做某件事的一組。The plain meaning is completely innocent字面上的意思完全無害: three golfers playing a round三個一起打球的高爾夫球友, three friends who always sit together三個總是坐在一起的朋友, three singers in a group三個人組成的歌唱團體。Sport — golf especially運動——尤其是高爾夫 — is where the word is most at home是這個字最常出現的地方。

BUT you should know this: in everyday modern English, threesome very often means three people having sex together, and for many speakers that is the FIRST meaning that jumps to mind. That second meaning is not in the word's history; it grew on top.

BUT you should know this但你要知道: in everyday modern English在現代日常英文裡, threesome very often means three people having sex togetherthreesome很常指三個人一起發生性行為, and for many speakers that is the FIRST meaning that jumps to mind對很多說話者來說，這其實是第一個跳出來的意思。That second meaning這第二個意思 is not in the word's history不是這個字原本就有的; it grew on top是後來長出來的。

So the word is safe in a clear context ("our golf threesome") and risky in a vague one ("we had a nice threesome last night"). If you just mean three people, "the three of us" or "a group of three" is safer and sounds more natural anyway.

So the word is safe in a clear context所以這個字在意思清楚的場合是安全的 ("our golf threesome")（像「our golf threesome」) and risky in a vague one但在模糊的場合就有風險 ("we had a nice threesome last night")（像「we had a nice threesome last night」)。If you just mean three people如果你只是想說「三個人」, "the three of us" or "a group of three"用「the three of us」或「a group of three」 is safer and sounds more natural anyway比較安全，聽起來也更自然。

Compare twosome (a pair) and foursome (four), which carry much less of that colour — though foursome catches a little of it too.

Compare twosome (a pair) and foursome (four)比較一下twosome（一對）和foursome（四人組）, which carry much less of that colour它們帶的那種色彩少很多 — though foursome catches a little of it too不過foursome也沾了一點點。