ETYMOLOGY
from Old French solacieus (soulaceus, etc.),
from solas (solace, comfort, consolation)
EXAMPLE
“… þou allone most swete & most solacious, þou allone most faire & most louely, þou allone most noble and most gloriose, …”
From: Translation of Thomas à Kempis, De Imitatione Christi, c1450
Lexicophilia 