παρατηρητέον
From LSJ
ὁ μὴ δαρεὶς ἄνθρωπος οὐ παιδεύεται → spare the rod and spoil the child | οne who hasn't been flayed is not being taught | if the man was not beaten, he is not educated | the man, who was not paddled, is not educated
English (LSJ)
A one must observe, Vett. Val. 156.20, Gp.3.13.10, lamb.in Nic.p.25 P. 2. one must take care, ὅπως μὴ… Arist.APr.66a25. 3. Gramm., one must note, ὅτι… Harp. s.v. περίπολος, Ath. 1.18f, Sch.Ar.Pax32, al.
Greek (Liddell-Scott)
παρατηρητέον: ῥημ. ἐπίθ., τοῦ παρατηρῶ, δεῖ παρατηρεῖν, Γεωπ. 3. 13, 10. 2) πρέπει τις νὰ προσέχῃ, ὅπως μὴ .. Ἀριστ. Ἀναλ. Πρότ. 2. 19, 1. 3) παρὰ τοῖς γραμμ., = σημειωτέον, ὅτι ..., Ἀθήν. 18F, Σχολ.