ETYMOLOGY
from Latin monti-, mons (mountain) + vagantem, pres. pple. of vagari (to roam) + -ant
EXAMPLE
“…Downward he speeds to mingle in the fray
As headlong rolls the torrent of the hills
When wintry storms montivagant outpour
Their pluvious treasures from the deep purloined…”
From: Rogvald: An Epic Poem
By John Fitzgerald Pennie, 1823
Lexicophilia 