Webster's Revised Unabridged Dictionary · 1913

Disparage

Disparage (?; 48) , transitive verb

[Old French desparagier, French déparager, to marry unequally; pref. des- (Latin dis-) + French parage extraction, lineage, from Latin par equal, peer. See Peer.]

1.
To match unequally; to degrade or dishonor by an unequal marriage. [Obsolete]
Alas! that any of my nation Should ever so foul disparaged be. — Chaucer
2.
To dishonor by a comparison with what is inferior; to lower in rank or estimation by actions or words; to speak slightingly of; to depreciate; to undervalue.
Those forbidding appearances which sometimes disparage the actions of men sincerely pious. — Bp. Atterbury
Thou durst not thus disparage glorious arms. — Milton

Disparage , noun

Inequality in marriage; marriage with an inferior. [Obsolete] — Chaucer
Dissuaded her from such a disparage. — Spenser