† ματαιότης, -ητος, ἡ
(< μάταιος), [in LXX for הֶבֶל, Ps 30 (31):638 (39):561 (62):9, al., and nearly 40 times in Ec; for שָׁוְא, Ps 25:4, al.; רִיק, etc.;]
vanity, emptiness, frailty, folly: Ro 8:20, II Pe 2:18; τ. νοός, Eph 4:17 (elsewhere only in Pollux, 6, 134, and Eccl.).†