ETYMOLOGY
from French insuffisant, from in- + suffisant (sufficient), present participle of of suffire (to suffice)
EXAMPLE
“… to make Edgar Adelyng kyng. Edgar Adelyng was [þe sone of Edward, þe whiche Edward was] þe sone of Edmond yrenside; but for þe child was insuffisant to so grete a charge, erle Harald, þat was fellere of wit, and richere in þe purs, and strengere of knyȝtes, occupied þe kyngdom …“
From: Polychronicon Ranulphi Higden maonachi Cestrensis
By: Ranulf Higden
Translated by: John Trevisa, 1387
Lexicophilia 