Suction.
To suck in general, ag ⊗ or um ⊗; suck something, ⊗ en.
To ask for a light, a smoker says to one smoking, agui ⊗ ac; and when wanting to ask for tobacco to smoke a while, sumusúpac.
To ask one smoking to light tobacco from his, i ⊗.
See nonót for the first meaning.