relating to the bottom of the ocean, especially to depths of between 3 000 and 6 000 metres 深海的,深渊的(大洋底部,尤指深度达 3 000-6 000 米间的) Oxford Collocations DictionaryAbyssal is used with these nouns:- depth
Word Originmid 17th cent.: from late Latin abyssalis ‘belonging to an abyss’ from Greek abussos ‘bottomless’, from a- ‘without’ + bussos ‘depth’.