Pharisee

Concise Oxford English Dictionary © 2008 Oxford University Press:
Pharisee /ˈfarɪsiː/

▶noun

• 1 a member of an ancient Jewish sect, distinguished by strict observance of the traditional and written law, and commonly held to have pretensions to superior sanctity.

• 2 a self-righteous person.

– derivatives
Pharisaic /ˌfarɪˈseɪɪk/ adjective,
Pharisaical adjective,
Pharisaism /ˈfarɪseɪˌɪz(ə)m/ noun.

– origin OE fariseus, via eccles. L. from Gk Pharisaios, from Aramaic prīšayyā ‘separated ones’.