coun·ter·feit 
(kountər-fĭt′)
(kountər-fĭt′)v. coun·ter·feit·ed, coun·ter·feit·ing, coun·ter·feits
v.tr.
1. To make an imitation or copy of (something), usually with the intent to defraud: counterfeits money.
2. To make a pretense of; feign: counterfeited interest in the story.
v.intr.
1. To carry on a deception; dissemble.
2. To make fraudulent copies of something valuable.
adj.
1. Made in imitation of what is genuine with the intent to defraud: a counterfeit dollar bill.
2. Simulated; feigned: "'You don't understand,' Morrison said with counterfeit patience" (Stephen King).
n.
A fraudulent imitation or facsimile.
[Middle English countrefeten, from contrefet, made in imitation, from Old French contrefait, past participle of contrefaire, to counterfeit : contre-, counter- + faire, to make (from Latin facere; see dhē- in the Appendix of Indo-European roots).]
counter·feit′er n.