speck

(noun) a very small spot. Synonyms: pinpoint. Example: "The plane was just a speck in the sky."

(noun) (nontechnical usage) a tiny piece of anything. Synonyms: atom, molecule, particle, corpuscle, mote.

(noun) a slight but appreciable amount. Synonyms: touch, hint, tinge, mite, pinch, jot, soupcon. Example: "This dish could use a touch of garlic."

(verb) produce specks in or on. Example: "Speck the cloth."