deadening (Adjective) — So lacking in interest as to cause mental weariness. ex. "the deadening effect of some routine tasks"
deadening (Noun) — The act of making something futile and useless (as by routine).
deadening (Verb) — Make vague, obscure or make (an image) less visible.
deadening (Verb) — Cut a girdle around so as to kill by interrupting the circulation of water and nutrients.
deadening (Verb) — Make vapid or deprive of spirit. ex. "deadened wine"
deadening (Verb) — Lessen the momentum or velocity of. ex. "deaden a ship's headway"
deadening (Verb) — Become lifeless, less lively, intense, or active; lose life, force, or vigour.
deadening (Verb) — Make less lively, intense, or vigorous; impair in vigour, force, activity, or sensation. ex. "deaden a sound"
deadening (Verb) — (chemistry) convert (metallic mercury) into a grey powder consisting of minute globules, as by shaking with chalk or fatty oil.