Vous avez cherché: observer (Anglais - Latin)

observer
tacet interfectorem

man as observer of mankind
homo spectans

spectatrix, spectatricis female observer or watcher;
spectatricis

servator, servatoris watcher, observer; preserver, savior;
servator

animadversor, animadversoris observer, one who notices/pays attention/observes;
animadversor

adnotator, adnotatoris one who makes notes, note taker; observer; l:controller of the annual income;
adnotator

contemplator, contemplatoris observer, surveyor; one who observes/studies/examines/ponders/contemplates;
contemplator

there shall not be found among you any one that maketh his son or his daughter to pass through the fire, or that useth divination, or an observer of times, or an enchanter, or a witch,
nec inveniatur in te qui lustret filium suum aut filiam ducens per ignem aut qui ariolos sciscitetur et observet somnia atque auguria ne sit maleficu

sharp eyed observers
penitus oculatus