(1):

(v. i.) To roll back, as a wave or flood; to be sent or driven back; to flow back, as a consequence or effect; to conduce; to contribute; to result.

(2):

(n.) The coming back, as of consequence or effect; result; return; requital.

(3):

(v. i.) To be in excess; to remain over and above; to be redundant; to overflow.

(4):

(n.) Rebound; reverberation.