Usage: 4 forms in 4 verses
Form Translated As     In Verse(s)
δεινόσ an awful LXX.Job.33.15
δεινόν an awful LXX.2Sam.1.9
δεινήν awful LXX.Job.2.13
δίνα in his awfulness LXX.Job.13.11

Liddell-Scott-Jones

δεινός (deinos) awful G:A

δεινός, , όν,

(δέος,[Refs 5th c.BC+] fearful, terrible; in [Refs 8th c.BC+], of persons and things, Χάρυβδις [Refs 8th c.BC+]; δ. ἰδέσθαι fearful to behold, [Refs 8th c.BC+]; in milder sense, awful, δεινή τε καὶ αἰδοίη θεός [Refs 8th c.BC+]danger, suffering, horror, [Refs 4th c.BC+]; awe, terror, [Refs 5th c.BC+]; δεινὸν γίγνεται μή.. there is danger that.., [Refs 5th c.BC+]; οὐδὲν δεινοὶ ἔσονται μὴ ἀποστέωσιν no fear of their revolting, [Refs]; δεινότατον μή.. the greatest danger lest.., [Refs 5th c.BC+]; δεινόν ἐστι, with infinitive, it is dangerous to do, [Refs 5th c.BC+]; δεινὸν ποιεῖσθαι take ill, complain of, be indignant at a thing: absolutely, [Refs 5th c.BC+]: with infinitive, ὑπὸ Μήδων ἄρχεσθαι [Refs 5th c.BC+]make complaints, [Refs 5th c.BC+]; δεινὸν or δεινὰ παθεῖν suffer illegal, arbitrary treatment, [Refs 5th c.BC+] adverb -νῶς, φέρειν [Refs 5th c.BC+]. γ; δ. καὶ ἀπόρως ἔχει μοι I am in dire straits, [Refs 5th c.BC+]

__II marvellously strong, powerful: δ. σάκος the mighty shield, [Refs 8th c.BC+]; simply, wondrous, marvellous, strange, τὸ συγγενές τοι δεινὸν θ᾽ ὁμιλία kin and social ties have strange power, [Refs 5th c.BC+]; δ. ἵμερος, ἔρως, [Refs 5th c.BC+]; frequently δεινὸν ἂν εἴη εἰ.. it were strange that.., as [Refs 5th c.BC+] adverb -νῶς marvellously, exceedingly, δ. μέλαινα, ἄνυδρος, [Refs 8th c.BC+]
__III clever, skilful, first in [Refs 5th c.BC+] ἀνὴρ δ. τε καὶ σοφό; of Odysseus, γλώσσῃ.. δεινοῦ καὶ σοφοῦ [Refs 5th c.BC+]; opposed to σοφός, of practical ability, [Refs]; opposed to ἰδιώτης, [Refs 4th c.BC+]: with infinitive, δεινὸς εὑρεῖν [Refs 4th c.BC+]; δ. λέγειν clever at speaking, [Refs 5th c.BC+]; δ. εἰπεῖν is rare, [Refs 5th c.BC+]; αἱ εὐπραξίαι δ. συγκρύψαι τὰ ὀνείδη are wonderfully liable to.., [Refs 5th c.BC+]; δ. περὶ τὸ ἀδικεῖν, περὶ Ὁμήρου, [Refs 5th c.BC+] (but also of the forcible, vehement, style in oratory, [Refs 4th c.BC+]; in bad sense, over-clever, [Refs 5th c.BC+]