Wiktionary
vb. 1 (context transitive English) to reduce the intensity of (a fire) 2 (context transitive English) to reduce the intensity of (an emotion or problem)
Usage examples of "damp down".
She turned her E-damp down another notch and turned on another drone, ignoring the background static that surged against her senses.
He tried to damp down his rising feelings of excitement, but couldn't.
Her hair hung damp down her back, and cold was coming through the glass, pebbling the white flesh of arms and thighs and belly.
Owen felt the damp down here by the river through all his leather clothes and his new boots.
Enough to be sure Sophia will find a way to spin this around to damp down the worst of the damage, and probably find one to turn it around to benefit the company.
Leaving her hair lying damp down her back, she hurried out the door leaving Morag to follow with a shake of her head.
She took his arm solicitously when he reeled against a sooty brick wall, leaving a dark streak of damp down his once-fine shirt, which had seen far better days in the fashionable West End.
MacDonald, you can let your fires damp down, but keep your furnaces warmed and ready to stoke.