The story
From Japanese 大小(だいしょう) (daishō), from 大(だい) (dai, “large”) + 小(しょう) (shō, “small”), in reference to the comparative size of the swords.
Etymology from Wiktionary, CC BY-SA 4.0.
daisho
Today it means: A traditional Japanese pair of swords, consisting of the katana and wakizashi. Full definition →