Dictionary.com
Thesaurus.com

Yankeefy

American  
[yang-kee-fahy, -ki-] / ˈyæŋ kiˌfaɪ, -kɪ- /

verb (used with object)

Yankeefied, Yankeefying
  1. to cause to acquire Yankee traits or characteristics.

    She was afraid that a year in a Connecticut college had Yankeefied her speech.


Etymology

Origin of Yankeefy

Yankee + -fy