Lexical Definition

‎διηνεκής‎ diēnekḗs (dee-ay-nek-es') perpetual ^G:A
neuter of a compound of ‎διά‎ and a derivative of an alternate of ‎φέρω‎

+ continually, for ever.

• carried through, i.e. (adverbially with ‎εἰς‎ and ‎ὁ‎ prefixed) perpetually

Abbott-Smith

** δι-ηνεκής, -ές (< διήνεγκα, aor. of διαφέρω) [in Sm.: Ps 47 (48):15, 88 (89):30 ;]
unbroken, continuous: adverbially, εἰς τὸ δ., continually (for exx., v. Deiss., BS, 251), He 7:3 10:1, 12, 14.†

Abbott-Smith References

Liddell-Scott-Jones

διηνεκής,

Doric dialect διᾱνεκής (see. below) [Refs 1st c.AD+], ές:— continuous, unbroken, ἀτραπιτοί τε διηνεκέες [Refs 8th c.BC+]; νώτοισι.. διηνεκέεσσι with slices cut the whole length of the chine, [Refs 8th c.BC+]; εἰ ὦλκα διηνεκέα προταμοίμην [Refs 8th c.BC+]; ὄρος δ. [Refs 2nd c.BC+]; τὸ δ. regularity, [Refs 2nd c.AD+]; of Time, perpetual, δ. νυκτί [Refs 2nd c.AD+] adverb διηνεκέως in phrase δ. ἀγορεύειν to tell from beginning to end, [Refs 8th c.BC+] (distinctly, positively,[Refs 8th c.BC+]; Boeotian dialect and Doric dialect διανεκῶς without ceasing, εὕδειν [Refs 6th c.BC+]; διηνεκῶς once in Trag., [Refs 4th c.BC+]; also εἰς τὸ διηνεκές in perpetuity, [NT+2nd c.AD+]; -κῶς invariably, opposed to πλεονάκις, [Refs 2nd c.AD+] — The Aeolic dialect and _Doric dialect_ form διᾱνεκής is used also in Attic dialect, as [Refs 5th c.BC+]; but νόμος διηνεκής a perpetual law is read in [Refs 5th c.BC+]

_{LSJ Scripture Refs: Heb.7.3}