μᾰταιόω,
A. bring to naught, Sch. S. Tr. 258 ,Gloss.
2. ματαιοῦσιν ἑαυτοῖς ὅρασιν inventa vision of their own, LXX Je. 23.16 .
II. more freq. in Pass. ,to be brought to naught,οὐ ματαιωθήσεται τὰ ῥήματαib. Ju. 6.4 .
2. become foolish, act foolishly,ἐματαιώθην σφόδραib. 1 Ch. 21.8 , cf. Ep.Rom. 1.21 ;μεματαίωταί σοιthouhast done foolishly, LXX 1 Ki. 13.13 .