She remained an uninvolved spectator during the argument.
uninvolved party
Frequency:
50
%
He was seen as an uninvolved party in the conflict.
uninvolved bystander
Frequency:
45
%
He stood by as an uninvolved bystander.
Idiomatic Expressions for uninvolved
Phrase: uninvolved bystander
Meaning: someone who is present at a situation but does not participate or get involved
Usage: As an uninvolved bystander, he witnessed the accident but did not offer any help.