διαπονητέον
From LSJ
ἀλλὰ διὰ τῆς ἀγάπης δουλεύετε ἀλλήλοις. ὁ γὰρ πᾶς νόμος ἐν ἑνὶ λόγῳ πεπλήρωται, ἐν τῷ Ἀγαπήσεις τὸν πλησίον σου ὡς σεαυτόν → but be enslaved to each other through love; for the whole Torah is fulfilled in one statement: You will love your neighbor as yourself (Galatians 5:13f.)
English (LSJ)
one must work hard at, Ph. 2.235.
Greek (Liddell-Scott)
διαπονητέον: ῥημ. ἐπίθ., πρέπει τις νὰ ἐργασθῇ πολύ, Κλήμ. Ἀλ. 284.
Spanish (DGE)
hay que esforzarse, practicar, ἐγκράτεια, ἣν ... δ. el autodominio que hay que practicar Ph.2.235, τὸ ἔντεχνον Clem.Al.Paed.3.10.51.