skin diver

Free-diving is any of various aquatic activities that share the practice of breath-hold underwater diving. Examples include breathhold spearfishing, freedive photography, apnea competitions and, to a degree, snorkeling. The activity that garners the most public attention is competitive apnea, an extreme sport, in which competitors attempt to attain great depths, times or distances on a single breath without direct assistance of an underwater breathing apparatus.
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Noun
1. an underwater swimmer equipped with a face mask and foot fins and either a snorkel or an air cylinder
(synonym) aquanaut
(hypernym) swimmer, natator, bather
(derivation) skin-dive

skin-diver /'skin,daivə/
danh từ thợ lặn trần (không mặc áo lặn)
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slang. แบงค์ 5 ปอนด์ (syn. deep sea diver)

danh từ
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