vigil
vig.il \'vij-*l\ n [ME vigile, fr. OF, fr. LL & L; LL vigilia watch on the
eve of a fe]ast, fr. L, wakefulness, watch, fr. vigil awake, watchful; akin
to L vige-re to be vigorous, vege-re to be active, rouse - more at WAKE 1a:
a watch formerly kept on the night before a religious feast with prayer or
other devotions 1b: the day before a religious feast observed as a day of
spiritual prepara tion 1c: evening or nocturnal devotions or prayers - usu.
used in pl. 2: the act of keeping awake at times when sleep is customary;
also a period of wakefulness 3: an act of surveillance (as for protection)
: WATCH