machiavellian

Short definition from Wiktionary

Adjective

1. 1
   Alternative form of Machiavellian.
2. 2
   Attempting to achieve goals by cunning, scheming, and unscrupulous methods, especially in politics.
3. 3
   Related to the philosophical system of Niccolò Machiavelli.

Noun

1. 1
   An unscrupulous schemer.