φρικαλέος
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)
α, ον,
A shivering with cold, Hp.VM16 (Comp.), Cat. Cod.Astr.2.165. II dreadful, horrid, AP7.69 (Jul.), 9.300 (Addaeus); σπιλάς ib.7.382 (Phil.), cf. Tryph.195; ἄχθος πόνων Androm. ap.Gal.14.33; awe-inspiring, λόγος Hymn.Is.12.
German (Pape)
[Seite 1306] 1) eigtl. rauh, uneben auf der Oberfläche; σπιλάς Philp. 32 (VII, 382); Tryphiod. 190. – 2) schaurig, schrecklich; νάπος Add. 2 (IX, 300); νέκυς Iul. Aeg. 59 (VII, 69); sp. D., wie Nonn. D. 9, 42.