groan v. i. [imp. & p. p. Groaned p. pr. & vb. n. Groaning.]
1. To give forth a low, moaning sound in breathing; to utter a groan, as in pain, in sorrow, or in derision; to moan.
For we . . . do groan, being burdened. --2 Cor. v. 4.
He heard the groaning of the oak. --Sir W. Scott.
2. To strive after earnestly, as with groans.
Nothing but holy, pure, and clear,
Or that which groaneth to be so. --Herbert.
adj : making low inarticulate sound as e.g. of pain or sorrow;
"the groaning wounded"; "moaning sounds in her sleep"