sentinel

Meaning

Noun

1. A sentry, watch, or guard.
2. (obsolete) A private soldier.
3. A unique value recognised by a computer program for processing in a special way, or marking the end of a set of data.
4. A sentinel crab.
5. (attributive) A sign of a health risk (e.g. a disease, an adverse effect).

Verb

1. (transitive) To watch over as a guard.
2. (transitive) To post a guard for.

Synonyms

sentry

guard

💂

watchman

watch

⌚

patrol

lookout

scout

guardsman

💂‍♂️

mark

guardian

picket

keeper

watchdog

watcher

caretaker

spotter

lookout man

protector

vedette

flag

blip

groundsman

intension

label

🏷️

labeling

look out

manciple

marker

marking

night watch

object

objective

palace guard

paladin

patrolman

purport

purpose

purview

retread

sake

🍶

scope

security guard

shielder

someone

supporter

tab

tag

tenor

transducer

translator

trustee

view

vigil

warder

watchmen

watch over

armed guard

stand watch

vidette

design

Thai guard

Thai sentry

Thai watchman

guard at night

chokidar

guide mark

characteristics identification

marked symbol

label symbol

advocate

fautor

aim

animus

attendant

attribute

badge

boss

cause

chief

conveyer

custodian

defender

designate

effect

emblem

end

🔚

ensign

fullback

full-back

garrison

governor

Translations

Wache

centinela

sentinelle

guardia

Wächter

💂

garde

💂

schildwacht

💂

wacht

factionnaire

nöbetçi

💂

Pronounced as (IPA)

/ˈsɛntɪnəl/

Etymology

Cognate with Italian: sentire

In summary

1570s, from Middle French sentinelle, from Old Italian sentinella (perhaps via a notion of "perceive, watch", compare Italian sentire (“to feel, hear, smell”)), from Latin sentiō (“feel, perceive by the senses”). See sense, sentient.