ἐπαίσθησις
From LSJ
ψυχῆς πείρατα ἰὼν οὐκ ἂν ἐξεύροιο πᾶσαν ἐπιπορευόμενος ὁδόν· οὕτω βαθὺν λόγον ἔχει → one would never discover the limits of soul, should one traverse every road—so deep a measure does it possess
English (LSJ)
εως, ἡ,
A perception, τὴν ἐ. τὴν ἐπί τινος ποιεῖν Epicur.Ep.1p.13U., cf. Phld.Mus.p.42K., al., Sor.2.19; τινός Epicur.Nat.125 G., Porph.Abst.1.57, 3.15.