IPA: /ˈwɔːtərli/
KK: /ˈwɔːtərli/
In a manner that resembles or is characteristic of water; often used to describe something that is fluid or lacking in substance.
The soup was waterily thin, lacking the richness of a hearty stew.
Waterily → It is formed from "water" (from Old English *wæter*, meaning liquid that falls as rain or flows in rivers) and the suffix "-ly" (meaning in a manner of). The word "waterily" means in a manner that resembles or relates to water.
Think of the word 'water' and remember that 'waterily' describes something done in a way that is like water.