ETYMOLOGY
from Old French estrivable, from estriver (to quarrel, contend) + -able
EXAMPLE
“…that eke the lay peple of the newe lawe is bounde, undir perel of greet synne, forto receyve her feith and al the leernyng of Goddis lawe, now beyng, in ech doutable and strivable poynt therof, fro and of the preestis of the newe lawe, and forto obeie to hem therynne, in lasse thanne the case of the seid excepcioun kan be executid …”
From: Book of Faith; a fifteenth century theological tractate
From the manuscript in the library of Trinity college, Cambridge
By Reginald Pecock, c1456
Lexicophilia 