Lexicon :: Strong's G3539 - noeō

νοέω, νόω; 1 aorist ἐνόησα; (present passive participle (neuter plural) νωυμενα); (νοῦς); from Homer down; the Sept. for הַבִין and הִתְבּונֵן, and for הִשְׂכִּיל;
1. to perceive with the mind, to understand: absolutely, with the addition τῇ καρδία, John 12:40 (Isaiah 44:18); with an accusative of the thing, Ephesians 3:4, 20; 1 Timothy 1:7; passive: Romans 1:20; followed by ὅτι, Matthew 15:17; Matthew 16:11; Mark 7:18; followed by an accusative with an infinitive, Hebrews 11:3; the absolute equivalent to to have understanding: Matthew 16:9; Mark 8:17.
2. to think upon, heed, ponder, consider: ὀείτω, namely, let him attend to the events that occur, which will show the time to flee, Matthew 24:15; Mark 13:14; (similarly νόει ὁ (R G ἅ) λέγω, 2 Timothy 2:7). (Compare: εὐνοέω, κατανοέω, μετανοέω, προνοέω, ὑπονοέω.)

BLB Scripture Index of Thayer's