Unwelcome
Part of speech: adjective
Definition: Not welcome.
Unwelcomed
Part of speech: adjective
Definition: Not having been welcomed.
Unwelcome as an adjective is not welcome. while Unwelcomed as an adjective is not having been welcomed.
Part of speech: adjective
Definition: Not welcome.
Part of speech: adjective
Definition: Not having been welcomed.
We hope you now know whether to use Unwelcome or Unwelcomed in your sentence.