κολύμβησις
From LSJ
Τὸ μανθάνειν δ' ἥδιστον εὖ λέγοντος, εἰ κέρδος λέγοι → It is the sweetest thing to learn from one speaking well, if they speak profitably
English (LSJ)
-εως, ἡ, pearl-fishery, Peripl.M.Rubr.35 (pl.), 58, Sch.Ptol.Geog.6.7.11.
German (Pape)
[Seite 1476] ἡ, das Untertauchen, Schwimmen, Sp.
Greek (Liddell-Scott)
κολύμβησις: -εως, ἡ, κολύμβημα, Ἀρρ. Περίπλ. 175, Πτολ.