skin diving
US /ˈskɪn ˌdaɪ.vɪŋ/
UK /ˈskɪn ˌdaɪ.vɪŋ/

1.
Skin Diving, Freitauchen
the sport of swimming underwater with a snorkel and flippers, without the use of breathing apparatus
:
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We went skin diving in the clear waters of the Caribbean.
Wir gingen Skin Diving in den klaren Gewässern der Karibik.
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She enjoys skin diving to observe marine life.
Sie genießt Skin Diving, um das Meeresleben zu beobachten.