ETYMOLOGY
from Latin mæstus (sad, mournful) + -ful
EXAMPLE
“…The Partridge.
EMong all other birds,
moste mestfull birde am I:
Emong all fethered foules,
I first complaine and crie…”
From: Flovvers of Epigrammes, out of sundrie the moste singular authours selected
Translated by Timothy Kendall, 1577
Lexicophilia 