gummed

Gummed is the past participle of the verb gum and, as an adjective, describes something made or rendered sticky by a gum-like adhesive, or something coated with adhesive that is activated by moisture. The term is commonly used in packaging, stationery, and related fields to indicate the presence of moisture-activated adhesive on a surface.

In practical use, gummed materials include gummed paper, gummed labels, and gummed tape. A gummed label has a moisture-activated adhesive on its back and must be moistened to adhere to a surface. Gummed paper or tape carries this adhesive as a coating that is released by water, enabling a secure bond without a separate applicator.

Figuratively, the word appears in phrases such as “to gum up” or “to get gummed up,” meaning to become clogged, obstructed, or slowed by sticky residue or other impediments. This usage can describe mechanical systems, workflows, or processes that have become difficult to operate due to obstruction.

Etymology traces gummed to the noun gum, referring to a sticky resin or adhesive substance. The term has been used in English for centuries to distinguish adhesive-backed items from those that are dry or require other methods of bonding.

See also: gum (adhesive), gummed tape, gummed labels, stamps.