deepness/ˈdiːpnəs/EtymologyFrom 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”).deepness means the state or quality of being deep (either physically or metaphorically). Lexicurio rates it Rare gem — a strength score of 83 out of 100.nounThe state or quality of being deep (either physically or metaphorically)