sub-aqua
adjective /ˌsʌb ˈækwə/
/ˌsʌb ˈɑːkwə/
[only before noun] (British English)- connected with sports that are done underwater
- sub-aqua diving
- sub-aqua equipment
Oxford Collocations DictionarySub-aqua is used with these nouns:- diving
Word Origin1950s: from sub- ‘under’ + Latin aqua ‘water’.