旁观者 /pángguānzhě/ meaning in English

beholder [beholders]▼(someone who observes or beholds; an observer or spectator)
noun
[UK: bɪ.ˈhəʊl.də(r)] [US: bɪˈho.ʊl.də(r)]

bystander [bystanders]▼(a person who, although present at some event, does not take part in it; an observer or spectator)
noun
[UK: ˈbaɪ.stæn.də(r)] [US: ˈbaɪ.ˌstæn.dər]

spectator [spectators]▼(observer)
noun
[UK: spek.ˈteɪ.tə(r)] [US: ˈspek.te.tər]