οἰκείωσις
From LSJ
Καλὸν τὸ γηρᾶν καὶ τὸ μὴ γηρᾶν πάλιν → Res pulchra senium, pulchra non senescere → Schön ist das Altsein, doch nicht alt sein wieder auch
English (LSJ)
εως, ἡ,
A appropriation, οἰ. ποιεῖσθαί τινος Th.4.128 : pl., profits, Vett.Val.202.17. 2 affinity, Ph.1.142, al. ; attraction, affection (cf. οἰκεῖος 111.2b), πρός τινα Diogenian.Epicur.4.55, Ph.1.256, Stoic.1.49, al., Asp. in EN 44.27, cf. Hierocl.p.35 A. ; ἡ πρὸς τὸ ζῆν οἰ. Plot.4.4.44 ; propensity, εἰς ἡδονήν Gal.5.456 ; τῆς ψυχῆς, opp. ἀλλοτρίωσις, Plot.3.6.1, 3.8.8, al., Porph.Sent.18 ; becoming familiar with, εἰς τοὺς θεούς Iamb.VP24.106.