a. He corroborated my account of the accident.

b. To make more certain; confirm.

c. [v. kuh-rob-uh-reyt; adj. kuh-rob-er-it]

d. Verb

a. The large dogs deters trespassers.

b. To discourage or restrain from acting or proceeding.

c.[dih-tur]

d. Verb

a. Ms. Rose invalidated her paper becuase it was plagerized.

b. To render invalid; discredit.

c.[in-val-i-deyt]

d. Verb

a. His recovery from the operation was complicated by an allergic reaction.

b. To make complex, intricate, involved, or difficult.

c.[v. kom-pli-keyt; adj. kom-pli-kit]

d. Verb

a. Give me a hint as to his identity.

b. An indirect, covert, or helpful suggestion; clue.

c.[hint]

d. Noun