snorkeling

US /ˈsnɔːr.kəl.ɪŋ/
UK /ˈsnɔːr.kəl.ɪŋ/
"snorkeling" picture
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the practice of swimming near the surface of the water with a snorkel and mask

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We went snorkeling in the clear blue waters of the Caribbean.
Snorkeling is a great way to explore underwater life without needing to scuba dive.
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engaging in the activity of swimming with a snorkel and mask

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They spent the afternoon snorkeling among the coral reefs.
Are you interested in snorkeling during our trip?