man·sue·tude /ˈmænswɪˌtud, -ˌtyud/
-noun
mildness; gentleness: the mansuetude of Christian love.

[Origin: 1350-1400; ME < L mānsuétūdō tameness, mildness, equiv. to mānsué-, base of mānsuéscere to become tame, mild (man(us) hand + suéscere to become accustomed) + –tūdō -tude]

Source: Dictionary.com.

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