κενόω, -ῶ (κενός, which see), [in LXX: Jer.14:2 15:9 (עָמָל pu.)*;] to empty. Metaphorical, to empty, make empty, vain or of no effect: καύχημα, 1Co.9:15; ἑαυτόν, of Christ, Php.2:7 (v Lft;
ICC, in 1, and esp. Gifford, Incarn, 54 ff.); pass, πίστις, Rom.4:14; ὁ σταυρός, 1Co.1:17; καύχημα, 2Co.9:3 (
AS)