NET

20 Brothers and sisters, do not be children in your thinking. Instead, be infants in evil, but in your thinking be mature.

Darby

20 Brethren, be not children^D8338 in [your] minds, but in malice be babes; but in [your] minds be grown^D8339 [men].

Darby Bible Notes

children - Paidion. see 1John 2.13. grown - i.e. 'full-grown,' as Eph. 4.13.

KJV

20 Brethren, be not children in understanding: howbeit in malice be ye children, but in understanding be men^K6942.

KJV Bible Notes

men: Gr. perfect or of a ripe age.

Strong's

20 Brethren ^G80, be^G1096 not^G3361 children^G3813 in understanding^G5424: howbeit^G235 in malice^G2549 be ye children^G3515, but^G1161 in understanding^G5424 be^G1096 men^G5046.