μάταιος
Alt. μάταιος, η, ον
Etym. μάτη
I. "vain, empty, idle, trifling, frivolous", Theogn., Hdt., attic
II. "thoughtless, rash, irreverent, profane, impious", Aesch.; τὸ μὴ μάταιον "seriousness, gravity", id=Aesch.
III. adv. -ως, "idly, without ground", Soph.