lalxu -la'u- gismu

x1 is a lake/lagoon/pool at site/within land mass x2.

See also daplu, djacu, rirxe, xamsi, zbani.


In notes:

daplu
x1 is an island/atoll/key of [material/properties] x2 in surroundings/body x3; x1 is insular.
djacu
x1 is made of/contains/is a quantity/expanse of water; (adjective:) x1 is aqueous/[aquatic].
rirxe
x1 is a river of land mass x2, draining watershed x3 into x4/terminating at x4.
xamsi
x1 is a sea/ocean/gulf/[atmosphere] of planet x2, of fluid x3; (adjective:) x1 is marine.
zbani
x1 is a bay in/of coast/shoreline x2.
limla'u
la1 is a pool where li1 swims in fluid li2.