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The Collaborative International Dictionary
Mordanting

Mordant \Mor"dant\, v. t. [imp. & p. p. Mordanted; p. pr. & vb. n. Mordanting.] To subject to the action of, or imbue with, a mordant; as, to mordant goods for dyeing.

Wiktionary
mordanting

vb. (present participle of mordant English)