society > morality > duty or obligation > [noun] > an immaterial debt (5)
debtc1386
That which is owed or due; anything (as money, goods, or service) which one person is under… a thing immaterial.
devoirc1386
Service due or rendered to any one. Obsolete.
scorea1617
figurative, esp. in certain phrases. to clear, pay, quit a scoreor scores: to requite an obligation; sometimes, to revenge an injury, to ‘be even with…