unprincipled

[ uhn-prin-suh-puhld ]
/ ʌnˈprɪn sə pəld /

adjective

lacking or not based on moral scruples or principles: an unprincipled person; unprincipled behavior.
not instructed in the principles of something (usually followed by in).

Origin of unprincipled

First recorded in 1625–35; un-1 + principled

OTHER WORDS FROM unprincipled

un·prin·ci·pled·ness, noun

Example sentences from the Web for unprincipled

British Dictionary definitions for unprincipled

unprincipled
/ (ʌnˈprɪnsɪpəld) /

adjective

lacking moral principles; unscrupulous
(foll by in) archaic not versed in the principles of (a subject)

Derived forms of unprincipled

unprincipledness, noun