遊撃 （ユウゲキ） raid, military attack by a mobile unit, hit-and-run attack, search-and-kill mission, search-and-destroy mission, military action without a predetermined target, attacking the enemy or assisting allies as the opportunity arises, shortstop, short

遊泳 （ユウエイ） swimming, bathing, getting on in the world

浮遊 （フユウ） floating, drifting, suspension, wandering (about)

回遊 （カイユウ） excursion, round trip, seasonal migration (of fish, etc.)

泳ぐ （およぐ） to swim, to struggle through (a crowd), to make one's way through the world, to get along (in life), to totter, to lose one's balance