τεθνήξεσθαι (tethnexesthai)
τεθνήξεσθαι is an Ancient Greek form of θνήσκω, meaning “die, be dying”. It is the future perfect middle/passive infinitive.
Found 28 times in the Ancient Greek texts on Socratos.
Where it is used
Diogenes Laertius, Vitae philosophorum 9.7.43: … δη ὑπέργηρων ὄντα πρὸς τῷ καταστρέφειν εἶναι. τὴν οὖν ἀδελφὴν λυπεῖσθαι ὅτι ἐν τῇ τῶν θεσμοφόρων ἑορτῇ μέλλοι τεθνήξεσθαι καὶ τῇ θεῷ τὸ καθῆκον αὐτὴ οὐ ποιήσειν τὸν δὲ θαρρεῖν εἰπεῖν καὶ κελεῦσαι αὑτῷ προσφέρειν ἄρτους θερμοὺς ὁσημ …
Lucian of Samosata, Contemplantes 8: … οῦ κρότου· νῦν δὲ μέγα φρονεῖ θαυμαζόμενος ἐπὶ τῇ τοῦ ταύρου φορᾷ. τί δʼ οὖν; οἰηθῶμεν ἄρα ἐλπίζειν αὐτὸν καὶ τεθνήξεσθαί ποτε; πόθεν ἐκεῖνος θανάτου νῦν μνημονεύσειεν ἂν ἐν ἀκμῇ τοσαύτῃ; ἔα τοῦτον οὐκ εἰς μακρὰν γέλωτα ἡμῖν παρέξο …
All forms of θνήσκω (conjugation table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Liddell-Scott-Jones, A Greek-English Lexicon (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.