IPA: /ˈwɔːtərbɔrn/
KK: /ˈwɔːtərˌbɔrn/
Relating to something that is carried or transmitted by water, such as diseases or goods.
The city implemented measures to prevent waterborne diseases after the flood.
Waterborne → It is formed from "water" (from Old English *wæter*, meaning liquid that falls as rain or flows in rivers) and "borne" (from Old English *beran*, meaning to carry). The word "waterborne" refers to something that is carried or transported by water.
Think of something that is 'carried' ('borne') by 'water' — that's what waterborne means.