To become damp or moist.
To lessen; to dull; to make less intense (said of emotions and non-physical things).
To become damped or deadened.
To make damp or moist; to make moderately wet.
To subject to the action of intense heat; to heat strongly; often said of incombustible or infusible substances.
to commence burning.
to spark off (something), to trigger
to set fire to (something), to light (something)