σιδηροδετέω
From LSJ
ἡ δὲ φύσις φεύγει τὸ ἄπειρον· τὸ μὲν γὰρ ἄπειρον ἀτελές, ἡ δὲ φύσις ἀεὶ ζητεῖ τέλος → nature, however, avoids what is infinite, because the infinite lacks completion and finality, whereas this is what Nature always seeks
English (LSJ)
(δέω)
A bind in iron, Heraclit.Ep.7.8 (Pass.).
German (Pape)
[Seite 879] in Eisen binden, in eiserne Ketten, Banden legen, Heraclit. epist.