transitive. To make dull and heavy as lead. Obsolete.

transitive. To render stale, out of date or uninteresting; to diminish interest in.

(transitive) (a) to render wooden; (b) Australian and New Zealand slang, to render insensible; to knock unconscious; also const. out.

figurative. transitive. To deprive (a thing) of its opportuneness or freshness of interest; to make stale. Obsolete.

transitive. To make dull, deprive of attraction, interest, or impressiveness; also to flatten down.

transitive. To make musty or mouldy. Also intransitive.

(transitive) = 2a.

To make leaden or dull.

figurative. To render ‘dry’, lifeless, uninteresting, etc.