泳ぎ (oyogi) means “swimming” | MotiTan Japanese Dictionary

More examples

彼の泳ぎはとてもきれいです。kare no oyo gi wa to te mo ki re i de su

His swimming is very graceful.

Swimming is the purposeful movement of the body through water, whether as an activity or a practiced skill.

水泳suiei: An activity or sport of moving through water by swimming.
泳力eiryoku: The ability to swim and move effectively through water.

水の中を進むために体を動かす動作や技術。mizu no naka o susu mu ta me ni karada o ugo ka su dō sa ya gi jutsu

泳ぎ (oyogi, "swimming") comes from the native verb 泳ぐ (oyogu, "to swim") through its stem form, which can function as a noun.

In everyday conversation, 泳ぎ (oyogi) can describe a person's swimming ability, not only the act of swimming.