noun
type of oar
Rare historical term for a specific kind of oar used in traditional Japanese boats. Not in modern everyday use.
打ち櫂は、和船で使われた櫂の一種だ。
An uchigai is a type of oar used on traditional Japanese boats.
櫂 is the general word for 'oar' or 'paddle'. 打ち櫂 refers to a specific historical type.
Compound of 打ち (uchi, 'striking') + 櫂 (kai, 'oar'). The exact historical derivation is uncertain; the term likely describes a particular rowing technique or oar design.