ἀδυνατέω
From LSJ
αἰὼν παῖς ἐστι παίζων, πεσσεύων∙ παιδός η βασιληίη → time is a child playing draughts; the kingship is a child's | a life-time is a child playing, playing checkers: the kingship belongs to a child | a whole human life-time is nothing but a child playing, playing checkers: the kingship belongs to a child | lifetime is a child at play, moving pieces in a game; kingship belongs to the child
English (LSJ)
of persons,
A to be ἀδύνατος, lack strength, Epich.266, Arist.Somn.Vig.454a27: c. inf., to be unable to do, Hp.de Arte7, Pl.R. 366d, X.Mem.1.2.23, Arist.EN1165b22, Pol.1287b17, etc. II of things, to be impossible, LXX Jb.10.13, Phld.Ir.p.98 W., Ev.Matt.17.20, Ev.Luc.1.37, Ps.-Callisth.3.26.