In English, many past and present participles of verbs can be used as adjectives. Some of these examples may show the adjective use.
The media and the public bothgrousedover the slow start.
From theCambridge English Corpus
There are grouses, and the interesting thing is that many of the grousers and the complainants are just those people whogrousedand complained before.
From the
Hansard archive
Example from the Hansard archive. Contains Parliamentary information licensed under theOpen Parliament Licence v3.0
These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors.