belabour

verb4

1. •
   To beat or thump (someone) soundly.

   • He saw the village; he was seen coming bending forward upon his horse, belabouring it with great blows, the girths dripping with blood. — 1856
2. •
   To discuss or explain (something) excessively or repeatedly; to harp on or overelaborate.

   • Let both sides explore what problems unite us instead of belabouring those problems which divide us. — 1961
3. •
   To attack (someone) verbally.
4. •
   (no longer used) To labour about; labour over; to work hard upon; to ply diligently.