Strong's 3700 (ὀπτάνομαι)

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appear, look, see, shew self

to gaze (i.e. with wide-open eyes, as at something remarkable; and thus differing from G991 (βλέπω), which denotes simply voluntary observation; and from G1492 (εἴδω), which expresses merely mechanical, passive or casual vision; while G2300 (θεάομαι), and still more emphatically its intensive G2334 (θεωρέω), signifies an earnest but more continued inspection; and G4648 (σκοπέω) a watching from a distance)

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a (middle voice) prolonged form of the primary (middle voice) ; which is used for it in certain tenses; and both as alternate of G3708 (ὁράω);