s, a, d, e, l, n, t, i are letters that make 'stand sentinel'
el, AN, ti, NT, sentinel, tine, sen, en, SE, EL, tan, sent, in, stand, tin, IN, NE, ND, In, Nd, Ne, Se, Ta, Ti are words within 'stand sentinel'
1 possible definitions for 'stand sentinel'
Under this definition, stand sentinel is a verb and has the following properties:
stand guard, stand watch, keep guard have the same meaning as 'stand sentinel'
'stand sentinel' can be a type of guard.
"We must stand sentinel to protect ourselves", "The jewels over which they kept guard were stolen"