limna -lim- gismu

x₁ (agent) swims in fluid x₂.

In notes:

djacu: x₁ is made of/contains/is a quantity/expanse of water; (adjective:) x₁ is aqueous/[aquatic].
fulta: x₁ (passive) floats on/in fluid (gas/liquid) x₂; x₁ is buoyant.
klama: x₁ comes/goes to destination x₂ from origin x₃ via route x₄ using means/vehicle x₅.
litru: x₁ travels/journeys/goes/moves via route x₂ using means/vehicle x₃; x₁ is a traveller.
brabaktu: bar₁=bak₁ is a swimming pool filled with bak₂, made of material bak₃.
flulimna: l₁=f₁ (agent) swims on liquid l₂=f₂.
limla'u: la₁ is a pool where li₁ swims in fluid li₂.
limna'i: n₁ is a flipper [body-part] of n₂.
runla'u: l₁=r₁ is an (artificial) pool at site/within land mass l₂.
tsazezu: x₁ performs workout/exercise/training x₂ (ka) using equipment/accessories x₃.
volmna: x₁ flies/swims through fluid x₂ using means of propulsion/lift x₃.