旁觀者

observer / spectator

one side / other / different / lateral component of a Chinese character (such as 刂[dao1], 亻[ren2] etc)

spectator / non-participant

surname Guan

to look at / to watch / to observe / to behold / to advise / concept / point of view / outlook

Taoist monastery / palace gate watchtower / platform

(after a verb or adjective) one who (is) ... / (after a noun) person involved in ... / -er / -ist / (used after a number or 後|后[hou4] or 前[qian2] to refer to sth mentioned previously) / (used after a term, to mark a pause before defining the term) / (old) (used at the end of a command) / (old) this

an outsider can see things more clearly or objectively than those involved (idiom)

an outsider can see things more clearly or objectively than those involved (idiom)