damning

What it means

1. Condemning; (often) sufficient to defeat a political or commercial rival.

   damning evidence was clear for all to see

   1 more example

   In terms of infrastructure, Frank says there has been better news in recent years, following a highly damning report prepared for the Friends of the Far North Line campaign group by consultant Tony Glazebrook [...].

   2021 November 3, Paul Stephen, “As far north as you can go... to Thurso”, in RAIL, number 943, page 48

In a sentence

damning evidence was clear for all to see

Where it comes from

1. Middle Englishdampnynge
2. Englishdamning

From Middle English dampnynge; equivalent to damn + -ing.