gel is a 3 letter word for sticky substance.
Probably "daub", though it doesn't have to be a sticky substance - to smear any substance on something is to daub it on.
daub
Daub
The word is daub. It means to coat or smear a surface with a sticky substance in a liberal way.
daub
Probably 'daub'
spread
Dowb
easy the answer is spread
daub
daub
daub - to cover or coat with soft, adhesive matter, as plaster or mud
The smear test will determine if you have cervix cancer.This is nothing more than a childish smear campaign by a jealous individual.
daub
To overspread with anything unctuous, viscous, or adhesive; to daub; as, to smear anything with oil., To soil in any way; to contaminate; to pollute; to stain morally; as, to be smeared with infamy., A fat, oily substance; oinment., Hence, a spot made by, or as by, an unctuous or adhesive substance; a blot or blotch; a daub; a stain.