The phrase gives you a visual image of a single tree standing there, which combined with its location at the gate suggests the image of a sentinel or soldier on guard at a gate.
The term Sentinel can refer to a person or thing that watches or stands as if watching, or, more notably in this case a soldier stationed as a guard to challenge all comers and prevent a surprise attack. Basically, its a guard who stands watch to prevent a surprise attack.
Sentinel: A sentry or guard.
Sentinel or sentry.
sentinel
watch, protector, guard, sentinel
A sentinel is a person or a figure representing a god or Deity that is supposed to guard or protect something.
The word "sentinel" can function as both a noun and a verb. As a noun, it refers to a guard or a lookout. As a verb, it means to watch over or guard.
guard : sentinel
guard : sentinel
A name too awesome for a definition!!! - Well I know that it means sentinel or guard in arabian.
It is the first node in which the lymphatic drainage occura in a particular area.
A sentry.