人：待在人群裡最自在
把「成群」這幅畫面放到人身上。一個人有選擇的時候，還是往人多的地方走，那就是 gregarious。這一支是現在最常見的用法，也是最可能在日常閱讀裡遇到的。
adjective · C1
A gregarious person enjoys being with other people, is friendly and easy to talk to, and looks for company instead of spending time alone.
外向愛交際
核心畫面
One way to picture gregarious: something that is almost never found alone. Deer move as a herd, birds feed as a flock, small mushrooms come up twenty at a time, and the same word gets turned on the person who walks into a room and heads for the fullest table. Wherever it goes, it points at one habit — being with others rather than apart.
gregarious 可以想成一幅畫面：這個東西很少單獨出現。鹿成群走，鳥成群吃，小菇一冒就是一整叢。把同一幅畫面搬…更多收起
gregarious 可以想成一幅畫面：這個東西很少單獨出現。鹿成群走，鳥成群吃，小菇一冒就是一整叢。把同一幅畫面搬到人身上，就變成一個人走進餐廳，直接坐到最熱鬧的那一桌。不管講的是動物、植物還是人，指向的都是同一個習慣——待在群體裡，而不是自己一個。這是一個好記的看法，不是字源上的證明。From the word’s history
The supplied source records only that English borrowed this word from Latin gregārius, first attested 1688. The same entry separately lists an older, plain sense: pertaining to a flock or crowd. That older sense sits closest to the group picture. The source does not gloss the Latin word itself, so nothing further is claimed here.
來源資料只記到：1688 年左右借自拉丁文 gregārius。同一份資料另外收了一個較舊的意思——「跟一群、跟群體有關」。這個舊意思跟上面那幅「成群」的畫面最接近。至於拉丁原字本身怎麼解釋，資料沒有寫，這裡也就不多說。
Wiktionary entry supplied in the evidence packet (source_ref kaikki:3f6f69a190036ae4:209369552)
Two branches
生物：成群生活、成叢生長
這一支就是畫面本身，沒有比喻。動物成群移動、植物成叢冒出來，講的都是「很少單獨出現」這個事實。兩個意思都出現在圖鑑和報告裡，屬於專業用語。
adjective · C1
In writing about animals, gregarious means that the animal normally lives, feeds, and moves in a group — a herd, a flock, or a pack — rather than on its own.
群居的