Definition of downrate in US English:

downrate

verb

[with object]
  • Make (someone or something) lower in value, standard, or importance.

    • ‘The second issue on which most analysts seem to agree is that the current bear market is based on a stream of negative company financial results where earnings are either downrated or where there are no earnings at all, only losses.’
    • ‘Have you ever flagged or downrated a question just because you didn't like what the person asked?’

Pronunciation

downrate

/ˌdounˈrāt/