(1):

(v. t.) To tear or separate into minute shreds, as with needles or similar instruments.

(2):

(n.) One who teases or plagues.

(3):

(v. t.) To comb or card, as wool or flax.

(4):

(v. t.) To stratch, as cloth, for the purpose of raising a nap; teasel.

(5):

(v. t.) To vex with importunity or impertinence; to harass, annoy, disturb, or irritate by petty requests, or by jests and raillery; to plague.