嘘つき
うそつき · usotsuki · JLPT N1 · noun
liar
嘘 (lie) + つき, the noun form of つく (to tell), as in 嘘をつく (to tell a lie): one who tells lies = liar
Built from 嘘 (lie) and つき, the noun form of つく (to tell), as in 嘘をつく (to tell a lie). Literally a person who keeps telling lies.