What does encrust mean?
Encrust is a verb meaning to cover something with a hard outer layer, or to develop such a layer on a surface. It works both transitively and intransitively: barnacles encrust a ship's hull, and minerals encrust inside a pipe over time. The word appears frequently in the passive construction 'encrusted with', which can describe either desirable decoration — crowns encrusted with diamonds — or unwanted buildup — machinery encrusted with rust. This dual character gives the word a flexible connotation: glamorous when applied to gems, grimy when applied to dirt. It derives from the Latin 'crustare', related to 'crusta' (crust), the same root behind 'crustacean' and 'incrustation'. Writers value it because it suggests a thick, hardened, often gradual accumulation rather than a simple surface coating, making it ideal for describing decay, mineral deposits, and lavish ornament alike.
verbTo cover or enclose a surface with a hard outer layer or crust, or to form such a layer on something.
- To cover or decorate a surface with a hard outer layer, often of something valuable (gems) or unwanted (barnacles, salt).
- (Intransitive) To form a hard crust on a surface.
"Barnacles encrusted the hull of the abandoned ship."
"Salt from the sea air had encrusted the windows of the cottage."
"Over the centuries, minerals encrusted on the walls of the cave, forming glittering deposits."
The jewels that encrusted Tutankhamun's burial mask have kept the word glamorous for a century — but most of the time, encrusting is what barnacles and limescale do.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of encrust
Encrust comes from the Latin verb 'crustare', meaning to cover with a crust, derived from 'crusta', meaning a hard outer shell or rind. The word entered English in the early 17th century, initially in the spelling 'incrust', reflecting its passage through French 'incruster'. Its Latin root also gave English 'crustacean', 'custard', and 'incrustation', all pointing back to the idea of a hardened outer layer.
Related word forms
How encrust is actually used
Often used in the passive ('was encrusted with'). When the coating is precious (jewels, gold), it carries a positive connotation; when it's barnacles, grime, or limescale, it is negative. The variant spelling 'incrust' exists but is less common.
Easily confused with encrust
'Entrust' means to give someone the responsibility for something, while 'encrust' means to cover with a hard crust.