belabor

Từ điển American Heritage Dictionary 4th

be·la·bor (bĭ-lāʹbər)tr.v. be·la·bored, be·la·bor·ing, be·la·bors
1. To attack with blows; hit, beat, or whip. See Synonyms at beat.
2. To assail verbally.
3. To discuss repeatedly or at length; harp on:
Don't belabor the point.