from Latin discors, discord- adj. (or English discord n.) + -ous
Cf. medieval Latin discordiosus, Old French descordieus, of which the Eng. repr. would be discordious
1597-8 - Virgidemiarum, Sixe Bookes: First Three Bookes, of Toothlesse Satyrs 1597; the Three Last Bookes, of Byting Satyres 1598, Bp. Joseph Hall;
see Example below
From: Virgidemiarum: Satires,
By Joseph Hall, 1825
Lib. III. Sat. I. Ancient frugality and moden luxury.