remission

noun

1. A pardon of a sin; the forgiveness of an offence, or relinquishment of a (legal) claim or a debt.
2. A lessening of amount due, as in either money or work, or intensity of a thing.
3. An act of remitting, returning, or sending back.
4. (spectroscopy) Reflection or scattering of light by a material; reemission.