observer
ob-serv-er
noun
A person who watches or notices something carefully, often without participating.
"She was a keen observer of human behaviour."
Thesaurus
Synonyms: beholder, perceiver, percipient, commentator
ob-serv-er
A person who watches or notices something carefully, often without participating.
"She was a keen observer of human behaviour."
Synonyms: beholder, perceiver, percipient, commentator