fleeing ...1650 obs.
from Latin fugientem pr. pple. of Latin fugere to flee
FIRST DOCUMENTED USE
1650 - see Example below
"...lest the fugient should first fly away, before the Fire could any way bring forth the persequent thing..."
(persequent = pursuing, following behind)
From: Fasciculus Chemicus: Chymicall Collections
Translated by Elias Ashmole, 1650
• A New English Dictionary on Historical Principles,
James Murray, 1887-1933