IPA: /ˈʃælənəs/
KK: /ˈʃælənəs/
The quality of being not deep, either literally, like in water, or figuratively, like in thoughts or feelings.
The shallowness of the pool made it safe for children to play.
Shallowness is formed from "shallow" (from Old English "sceald", meaning not deep) and the suffix "-ness" (meaning the state or quality of). The word "shallowness" refers to the state of being shallow or lacking depth.
Think of the word 'shallow' which means not deep, and remember that 'shallowness' describes the quality of being shallow.