(1):

(v. i.) To strive after earnestly, as with groans.

(2):

(n.) A low, moaning sound; usually, a deep, mournful sound uttered in pain or great distress; sometimes, an expression of strong disapprobation; as, the remark was received with groans.

(3):

(v. i.) To give forth a low, moaning sound in breathing; to utter a groan, as in pain, in sorrow, or in derision; to moan.

(4):

(v. t.) To affect by groans.