vigil
Pronunciation: /ˈvɪdʒɪl/
noun
- 1a period of keeping awake during the time usually spent asleep, especially to keep watch or pray: my birdwatching vigils lasted for hours as he lay in a coma the family kept vigil
- a stationary, peaceful demonstration in support of a particular cause, typically without speeches: the group held a candlelight vigil outside the jail

Origin:
Middle English (in vigil (sense 2)): via Old French from Latin vigilia, from vigil 'awake'