противник meaning in English

adversary [adversaries]▼(opponent)
noun
[UK: ˈæd.və.sə.ri] [US: ˈæd.vər.ˌse.ri]

enemy [enemies]▼(someone who is hostile to, feels hatred towards, opposes the interests of, or intends injury to someone else)
noun
[UK: ˈe.nə.mi] [US: ˈe.nə.mi]

opponent [opponents]▼(one who opposes another)
noun
[UK: ə.ˈpəʊ.nənt] [US: əˈpo.ʊ.nənt]

opposite [opposites]▼(opponent)
noun
[UK: ˈɒ.pə.zɪt] [US: ˈɑː.pə.zət]

windmill [windmills]▼(metaphorical: imaginary enemy)
noun
[UK: ˈwɪnd.mɪl] [US: ˈwɪnd.ˌmɪl]