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
 Webster's English Dictionary
 Webster's English Dictionary