from Latin ēvigilāt- ppl. stem of ēvigilāre, from ē- out + vigilāre to watch, from vigil awake
1730-6 - Dictionarium Britannicum: or a More Compleat Universal Etymological English Ddictionary, Nathan Bailey;
"Evigilate, to watch diligently, to study hard;'
From: The Portfolio
Comprising the Flowers of Literature, The Spirit of the Magazines, The Wonders of Nature and Art, The Family Physician and Domestic Guide, The Mechanic's Oracle.
Vol III, 1824
A Love Letter from a Pedantic Schoolmaster