ἀνικανότης
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.
ἀνῐκᾰνότης: -ητος, ἡ, τὸ μὴ ἐπαρκεῖν, ἡ ἔλλειψις ἱκανότητος, Ἀμφιλόχ. σ. 101.