deepness
nounUK /ˈdiːpnəs/
Etymology From Middle English depnesse, from Old English dēopnes (“deepness; depth; an abyss”), from Proto-West Germanic *deupnassī, equivalent to deep + -ness. Cognate with German Low German Deepnis (“deepness, depth”).
1
Usually The state or quality of being deep (either physically or metaphorically)