sen ‧ ti ‧ nel /ˈsentɪn ə l/ BrE AmE noun [countable] old-fashioned
[ Date: 1500-1600 ; Language: French ; Origin: sentinelle , from Old Italian sentinella , from sentina 'keeping watch' , from sentire , from Latin ; ⇨ ↑ sentient ]
a sentry
sen ‧ ti ‧ nel /ˈsentɪn ə l/ BrE AmE noun [countable] old-fashioned
[ Date: 1500-1600 ; Language: French ; Origin: sentinelle , from Old Italian sentinella , from sentina 'keeping watch' , from sentire , from Latin ; ⇨ ↑ sentient ]
a sentry
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012