συγγηράσκω
From LSJ
Ἀναξαγόρας δύο ἔλεγε διδασκαλίας εἶναι θανάτου, τόν τε πρὸ τοῦ γενέσθαι χρόνον καὶ τὸν ὕπνον → Anaxagoras used to say that we have two teachers for death: the time before we were born and sleep | Anaxagoras said that there are two rehearsals for death: the time before being born and sleep
English (LSJ)
fut.
A -γηράσομαι E.Fr.1058: aor. -εγήρᾱσα Alciphr. 2.3:—grow old together with, γηράσκοντι [τῷ σώματι] συγγηράσκουσι [αἱ φρένες] Hdt.3.134; ἐγώ σ' ἔθρεψα σὺν δὲ γηράναι θέλω (cf. γηράσκω) A.Ch.908, cf. E. l.c., Isoc.1.7:—pres. συγγηράω Aret. CA1.5.