noun
sword guard; tsuba
The hand guard on a Japanese sword, often decorative. Also used in compound terms like 鍔迫り合い (tsubazeriai, 'sword fight with guards locked').
この刀の鍔には美しい彫刻が施されている。
The guard of this sword has beautiful carvings.
noun
Refers to the projecting edge of a hat or cap. Often used in phrases like 帽子の鍔 (boushi no tsuba).
日差しが強いので、鍔の広い帽子をかぶった。
The sun was strong, so I wore a wide-brimmed hat.
noun
brim (of a pot); flange; collar
The projecting rim or edge of a container, pipe, or similar object. Common in technical or everyday contexts.
鍋の鍔を持って運ぶと安定する。
It's stable to carry the pot by holding its brim.
縁 (fuchi) is a more general word for 'edge' or 'rim' of various objects, while 鍔 (tsuba) specifically refers to a projecting guard or brim, often with a functional or decorative purpose.
The word つば is native Japanese. The kanji 鍔 and 鐔 are Chinese characters adopted for their meaning related to sword fittings. The exact historical derivation of the word is uncertain.