Lexical Definition

‎βλάσφημος‎ blásphēmos (blas'-fay-mos) blasphemous G:A
from a derivative of ‎βλάπτω‎ and ‎φήμη‎

blasphemer(-mous), railing.

Usage: 4 forms in 6 verses
Form Translated As     In Verse(s)
βλάσφημοσ blasphemous LXX.Isa.66.3
βλάσφημον a blasphemer 1Tim.1.13
a reviling 2Pet.2.11
βλάσφημοι abusive 2Tim.3.2
βλάσφημα blasphemous Acts.6.11Acts.6.13

Abbott-Smith

βλάσφημος, -ον (< βλασ-, of uncertain deriv., v. Thayer, Boisacq; + φήμη, speech), [in LXX: Is 66:3 (מְבָרֵךְ אָוֶן), Wi 1:6, Si 3:16, II Mac 9:28 10:4, 36 * ;]

(a) evil-speaking, slanderous, blasphemous: Ac 6:11, II Ti 3:2, II Pe 2:11 (cf. Ju 9);
(b) as subst. a blasphemer: I Ti 1:13 (Cremer, 570).†

Abbott-Smith References

Book Refs
Isaiah 66:3
Acts 6:11
1 Timothy 1:13
2 Timothy 3:2
2 Peter 2:11
Jude 1:9

Liddell-Scott-Jones

βλάσφημος-ος, ον,

speaking ill-omened words, evil-speaking, [Refs 4th c.BC+]: with genitive, against.., [Refs 1st c.AD+]

__2 of words, slanderous, libellous, δέδοικα μὴ βλάσφημοςον μὲν εἰπεῖν ἀληθὲς δ᾽ [Refs 4th c.BC+]. adverb -μως[Refs 2nd c.AD+]
__3 blasphemous, ἔθνη [βλάσφημοςα NT.Rev.13.5 ">LXX+NT]: substantive, blasphemer, [LXX+NT]

LSJ Scripture Refs: Acts.6.11Rev.13.51Tim.1.13