undesirable - definition and synonyms

adjective 

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/ˌʌndɪˈzaɪrəb(ə)l/
  1. 1
    bad, or harmful

    The drug can have undesirable side effects.

  2. 2
    someone who is undesirable is not trusted or welcomed, because people think they are likely to cause trouble or be involved in crime

    The two journalists were expelled from the country as ‘undesirable visitors’.

derived word

undesirably

adverb