Abbott-Smith Manual Greek Lexicon
παρα-τηρέω (G3906)
6 παρα-τηρέω , -ῶ , [in LXX: Ps 36 (37):12 ( זמם ), 129 (130):8 ( שׁמר ), Da TH 6:11 ( 12 ), Su 1:12 , 15 , 16 *;] to watch closely , observe narrowly : so mid., τ. πύλας , Ac 9:24 ; with evil intent, Mk 3:2 , Lk 20:20 (absol., v. Field, Notes , 74); so mid., Lk 6:7 14:1 . to observe scrupulously (of days and seasons; cf. Ex 12:42 , Sm.): mid., Ga 4:10 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain