Lexical Definition

‎δειλός‎ deilós (di-los') timid G:A
from (dread)

fearful.

Usage: 3 forms in 6 verses
Form Translated As     In Verse(s)
δειλόσ timid LXX.Deut.20.8LXX.Judg.7.3LXX.2Chr.13.7
δειλοῖσ to cowardly Rev.21.8
δειλοί fearful Matt.8.26Mark.4.40

Abbott-Smith

δειλός, -ή, όν (< δέος), [in LXX for רַךְ, etc. ;]
cowardly, fearful: Mt 8:26, Mk 4:40, Re 21:8.†

Abbott-Smith References

Book Refs
Matthew 8:26
Mark 4:40
Revelation 21:8

Liddell-Scott-Jones

δειλός, , όν,

(δέος):

__I of persons, cowardly, opposed to ἄλκιμος, [Refs 8th c.BC+]; opposed to ἀνδρεῖος, [Refs 5th c.BC+]: hence, vile, worthless, [Refs 8th c.BC+]; opposed to ἐσθλός, lowborn, mean, [Refs 8th c.BC+]; of animals, [Refs 5th c.BC+]afraid of.., [Refs]: c.infinitive [Refs 1st c.BC+]. adverb -λῶς[Refs 3rd c.BC+]
__I.2 more commonly, miserable, wretched, with a compassionate sense, δειλοὶ βροτοί poor mortals! [Refs 8th c.BC+]; δειλέ poor wretch! δειλοί poor wretches! [Refs 8th c.BC+]
__II of things, miserable, wretched, γῆρας [Refs 8th c.BC+]; δ. δ᾽ ἐνὶ πυθμένι φειδώ[Refs 5th c.BC+]; ἔργα, λόγος, etc., [Refs 6th c.BC+]: comparative, [Refs 3rd c.AD+]: superlative, [Refs 5th c.BC+]: neuter plural as adverb, ὀχλεῖ μοι δειλὰ Τρωΐλος [Refs 3rd c.AD+] —Trag. use δειλός chiefly in former sense, δείλαιος in latter.