mildnessEtymologyFrom Middle English mildenesse, from Old English mildnes, mildness, equivalent to mild + -ness. Cognate with Old High German miltnissa (“compassion, mercy, sympathy, pity”).mildness means the quality of being mild; gentleness. Lexicurio rates it Rare gem — a strength score of 74 out of 100.nounThe quality of being mild; gentleness.“A ſnowy Feather ſpangled white he beares, To ſignifie the mildneſſe of his minde, That ſatiate with ſpoile refuſeth blood:”