διαπεπειρᾶσθαι
From LSJ
Ἐς δὲ τὰ ἔσχατα νουσήματα αἱ ἔσχαται θεραπεῖαι ἐς ἀκριβείην, κράτισται → For extreme diseases, extreme methods of cure, as to restriction, are most suitable.
Greek > English (Woodhouse Verbs Reversed)
(see also διαπειράομαι): to have had a foretaste of, to have had a taste of, to have had experience of