合口
あ
い
く
ち
Meanings
1
Informal term for a close friend, often used among men. Slightly old-fashioned; 親友 or 仲間 are more common today.
He's been a close friend of mine since childhood.
2
Refers to a short-bladed weapon, often a stiletto or dagger. The kanji 合口 literally means 'matching mouth', referring to the hilt fitting snugly into the scabbard. See also 匕首.
See also: 匕首
The samurai concealed a dagger in his breast pocket.
3
unbalanced head-to-head record (sumo)
Sumo term for a win-loss record between two wrestlers that is heavily lopsided, e.g., one wrestler has many more wins than the other in their match history.
These two have an unbalanced record, with the yokozuna dominating at ten wins to one loss.