swab

(noun) implement consisting of a small piece of cotton that is used to apply medication or cleanse a wound or obtain a specimen of a secretion.

(noun) cleaning implement consisting of absorbent material fastened to a handle; for cleaning floors. Synonyms: swob, mop.

(verb) wash with a swab or a mop. Synonyms: swob. Example: "Swab the ship's decks."

(verb) apply (usually a liquid) to a surface. Synonyms: dab, swob. Example: "Dab the wall with paint."