warn
From LSJ
Καὶ τῶν λεγόντων εὖ καλὸν τὸ μανθάνειν → It is a fine thing to learn from those who speak well
English > Greek (Woodhouse)
v. trans.
Admonish: P. and V. νουθετεῖν, παραινεῖν (dat.), διδάσκειν, συμβουλεύειν (dat.), V. παρηγορεῖν; see advise.
Tell beforehand: Ar. and P. προλέγειν (dat.), προαγορεύειν (dat.); see order.
Warn one against doing a thing: P. and V. παραινεῖν, etc., τινὶ μὴ, (infin.).
Warn a person against another: use bid one beware of.
Portend: see portend.