Lexical Definition

‎μέμφομαι‎ mémphomai (mem'-fom-ahee) to blame ^G:V
middle voice of an apparently primary verb

find fault.

• to blame

Abbott-Smith

** μέμφομαι, [in LXX: Si 11:7 41:7, II Mac 2:7*;]
to blame, find fault: absol., Ro 9:19; c. acc., αὐτούς (WH, txt.; αὐτοῖς, Rec., WH, mg.; on rendering with αὐτοῖς v. Westc., in l.), He 8:8.†

Abbott-Smith References

Liddell-Scott-Jones

μέμφομαι,

[Refs 6th c.BC+]: imperfect ἐμέμφετο [Refs]: future μέμψομαι [Refs 8th c.BC+]: aorist ἐμέμφθην [Refs 6th c.BC+]: present in passive sense, [Refs 2nd c.AD+]future μεμφθήσομαι Ps.-[Refs 4th c.BC+]:—blame, censure, first in [μέμφομαι occurs in 8th c.BC: Homerus Epicus): ">Refs 8th c.BC+]

__1 with accusative person, μέμψονται δ᾽ ἄρα τούς [Refs 8th c.BC+]; κατὰ τὸ μαντήϊον οὐκ ὀρθῶς ὁ Κροῖσος μέμφεται (i.e. τὸν Λοξίαν) [Refs 5th c.BC+]
__1.b c.accusative of things, οἶνε, τὰ μέν σ᾽ αἰνῶ, τὰ δὲ μέμφομαι [Refs 6th c.BC+]; μ. τὴν γνώμην, τὰ δῶρα, [Refs 5th c.BC+]
__2 with dative person et accusative of things, impute as blameworthy, cast in one's teeth, [Refs 7th c.BC+]; μ. τινὶ ὅτι.. [Refs 5th c.BC+]; οὕνεκα.. [Refs 5th c.BC+]; εἰ.. [Refs 5th c.BC+] with genitive person et accusative _of things_, ὃ μάλιστα μέμφονται ἡμῶν which is the chief complaint they make against us, [Refs 5th c.BC+]
__3 with dative person only, to be dissatisfied with, find fault with, [NT+5th c.BC+]: with participle added, μ. ἡμῖν λογισαμένοις [Refs 5th c.BC+]
__4 with genitive of things only, complain of, οὐ μάχης.. μέμψει [Refs 5th c.BC+]; τιμῆς ἐμέμφθη of her [neglected] honour [Refs 8th c.BC+]
__5 with infinitive with μή, μ. μὴ πολλάκις βουλεύεσθαι object that one ought not.., [Refs]
__6 absolutely, find fault, complain, [Refs 4th c.BC+] the plaintiffs, [Refs]

_{LSJ Scripture Refs: Heb.8.8}