Slacken
Part of speech: verb
Definition: To gradually decrease in intensity or tautness; to become slack. To make slack, less taut, or less intense.
Remit
Part of speech: verb
Definition: To forgive, pardonTo give up, stop succumbing to (a negative emotion etc.).To allow (something) to slacken, to relax (one's attention etc.).To show a lessening or abatement (of) a specified quality.To diminish, abate.To refer (something) for deliberation, judgment, etc. (to a particular body or person).To postpone.To transmit or send, as money in payment.
Part of speech: noun
Definition: terms of reference; set of responsibilities.