My head still buzzes thinking about how Zoro's swords each carry their own little story — in 'One Piece' the names usually come from prior owners, swordsmith lines, or the role the blade played. Wado Ichimonji, the one he kept from the very beginning, was Kuina’s sword and part of the Ichimonji school/family. The name itself basically breaks down to something like 'Wado' plus 'Ichimonji' — the latter literally means 'one line' or 'one character,' which fits its simple, straight, honest blade vibe. Zoro inherited it after Kuina’s death, so its name is tied to her family and legacy.
Then there’s Sandai Kitetsu — the 'Kitetsu' name marks a notorious swordsmith line in-universe and outside of it hints at iron/steel (tetsu). 'Sandai' means 'third generation,' so Sandai Kitetsu is literally the third-generation Kitetsu blade; it’s also known for being 'cursed' in the story, which is a big part of why Zoro picked it up (he loves a challenge). Yubashiri was one of his early blades and the name evokes imagery of evening rain or nightfall, though it met an unfortunate fate later on.
Shusui was famously Ryuma’s blade, a 'national treasure' in Wano — the name often translated as 'Autumn Water' and it reflects that legendary samurai flavor. After Thriller Bark Zoro kept it until Wano, when he returned it and received 'Enma' instead: Enma belonged to Kozuki Oden, and the name carries mythic weight (think of Enma the judge of the dead in Japanese lore). Enma’s personality as a sword — it draws Haki out of the user — ties perfectly to its ominous, legendary name. Each name in the set usually hints at origin (family, owner, smith) and atmosphere, and Oda loves mining Japanese sword lore for that flavor. I still get chills seeing the panels where the swords’ histories pop up; they’re tiny lore-bombs that make every duel feel heavier.