verb
1.
to cover with a surface layer
the floor was caked with filth
Synonyms: crust, encrust ( or incrust), incrustate, rime
Related Word: besmear, coat, smear, spread; cover, daub
2.
Synonyms: harden 1, concrete, congeal, dry, indurate, set, solidify
Related Word: compress, condense, contract, shrink