To make or become coarse or rough.

To become less refined or polished.

कम उच्चकोटि या चाकू करना।

English Usage: His remarks began to coarsen as the debate became more heated.

Hindi Usage: जैसे-जैसे बहस उग्र हुई, उसके टिप्पणियाँ कम चाकू करने लगीं।