Henry George Liddell, Robert Scott, An Intermediate Greek-English Lexicon

I.it is fated, necessary, Aesch., etc.; οὐδὲ ἓν ἴαμα ὅ τι χρῆν προσφέροντας ὠφελεῖν no one remedy which one was sure to do good by administering, Thuc.:—c. inf. it must, must needs, one must or ought to do, Hom., attic; more often, like Lat. oportet, c. acc. pers. et inf. one must, one must needs, it behoves, befits one to . . , οὐδέ τί σε χρὴ νηλεὲς ἦτορ ἔχειν Il., etc.; often the inf. must be supplied from the context, τίπτε μάχης ἀποπαύεαι; οὐδέ τί σε χρή (sc. ἀποπαύεσθαι), why cease from battle? for it behoves thee not, Il.; so, ὅθι χρὴ πεζὸν ἐόντα (sc. μάρνασθαι) Od.; ἐπιπλεύσειέ τις ὡς χρή (sc. ἐπιπλεῦσαι) Thuc.:—absol., ἐρεῖ τις, οὐ χρῆν [sc. τοῦτο ποιεῖν], ἀλλὰ τί χρῆν εἴπατε Eur. ap. Ar.

2.c. acc. pers. et gen. rei, οὐδέ τί σε χρὴ ἀφροσύνης thou hast no need of imprudence, i. e. it does not befit thee, Il.; μυθήσεαι ὅττεό (i. e. ὅτου) σε χρή thou wilt say what thou hast need of, Od.

II.sometimes in a less strong sense, πῶς χρὴ τοῦτο περᾶσαι; how is one to get through this? Theocr.

III.τὸ χρῆν (inf.) = χρεών, fate, destiny, Eur.