MEANING: adjective: Telling lies, especially as a habit.

ETYMOLOGY: From Latin mendac-, stem of mendax (lying), from mendum (fault or defect) that also gave us amend, emend, and mendicant. Earliest documented use: 1616.

AMENDACIOUS - changing frequently what one has written or promulgated

MENTACIOUS - full of thoughts about the chin

MENACIOUS - threatening