τηθή
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
French (Bailly abrégé)
ῆς (ἡ) :
grand'mère propr. ou comme t. de respect.
Étymologie: cf. τίτθη.