παραγηράω
From LSJ
περὶ οὐδὲν γὰρ οὕτως ὑπάρχει τῶν ἀνθρωπίνων ἔργων βεβαιότης ὡς περὶ τὰς ἐνεργείας τὰς κατ' ἀρετήν → since none of man's functions possess the quality of permanence so fully as the activities in conformity with virtue
English (LSJ)
A to be the worse for old age, be superannuated, ὁ δῆμος ὥσπερ παραγεγηρακώς Aeschin.3.251, cf. D.S.9.4, J.BJ1.30.3, Poll.2.16.