Webster's Revised Unabridged Dictionary · 1913

Blend

Blend (blend) , transitive verb

[Old English blenden, blanden, Anglo-Saxon blandan to blend, mix; akin to Gothic blandan to mix, Icelandic blanda, Swedish blanda, Danish blande, Old High German blantan to mis; to unknown origin.]

1.
To mix or mingle together; esp. to mingle, combine, or associate so that the separate things mixed, or the line of demarcation, can not be distinguished. Hence: To confuse; to confound.
Blending the grand, the beautiful, the gay. — Percival
2.
To pollute by mixture or association; to spoil or corrupt; to blot; to stain. [Obsolete] — Spenser

Blend ({not transcribed}) , intransitive verb

To mingle; to mix; to unite intimately; to pass or shade insensibly into each other, as colors.
There is a tone of solemn and sacred feeling that blends with our conviviality. — Irving

Blend , noun

A thorough mixture of one thing with another, as color, tint, etc., into another, so that it cannot be known where one ends or the other begins.

Blend , transitive verb

[Anglo-Saxon blendan, from blind blind. See Blind, a.]

To make blind, literally or figuratively; to dazzle; to deceive. [Obsolete] — Chaucer