watcher

Mane (Îngilîzî)

1. Someone who watches or observes.
2. (US) Someone who watches or observes.
3. Someone who keeps vigil.
4. A guard.
5. (Judaism, historical) A kind of angel appointed to watch over the human realm, in particular one of those who became fallen angels and begot the Nephilim.

Hevwate

guard

💂

observer

spectator

watchman

guardian

monitor

security guard

viewer

witness

watch

⌚

beholder

onlooker

guardsman

💂‍♂️

keeper

invigilator

cop

👮

caretaker

sentry

sentinel

looker

spotter

spy

supervisor

police officer

👮

watch-dog

scrutineer

beefeater

bystander

canvasser

clairvoyant

connoisseur

custodian

expert

overseer

patroller

patrolman

picket

policeman

👮‍♂️

proctor

protector

scout

screener

food taboo helper

steward

watchdog

contemplator

one who copulates

bank guard

observator

Werger

guardia

💂

Wächter

💂

vigilante

sorvegliante

guarda

💂

gardien

💂

osservatore

guetteur

observateur

παρατηρητής

spectateur

spettatore

témoin

guardiano

téléspectateur

Wekî (IPA) tê bilêvkirin

/ˈwɒt͡ʃ.ə/

Etîmolojî (Îngilîzî)

Ji Middle English mîras hatiye girtin: wacchere

In summary

From Middle English wacchere, wachere, wacher, equivalent to watch + -er.