freediving

enUK

free·div·ing

or free diving F5310150 (frē′dī′vĭng)n. Surface diving or underwater swimming without the use of an artificial breathing apparatus, especially the sport of surface diving as deeply as possible on a single breath of air.
free dive n. & v.

freediving

(ˈfriːdaɪvɪŋ) n (Swimming, Water Sports & Surfing) the sport or activity of diving without the aid of breathing apparatus freediver n