Lexical Definition

‎τάχα‎ tácha (takh'-ah) perhaps ^G:ADV
as if neuter plural of ‎ταχύς‎ (adverbially)

peradventure(-haps).

• shortly, i.e. (figuratively) possibly

Abbott-Smith

** τάχα (< ταχύς), adv., [in LXX: Wi 13:6 14:19 * ;]
(a) (chiefly poët.), quickly, presently;
(b) perhaps: Ro 5:7, Phm 15.†

Abbott-Smith References

Liddell-Scott-Jones

τάχα,

adverb, (τᾰχύς) quickly, presently, forthwith, frequently in [Refs 8th c.BC+], uses it only of time, [Refs 8th c.BC+]; ἦ τ. soon i'faith, [Refs 8th c.BC+]; of past time, τ. δ᾽ Ἕκτορος ἄγχι γένοντο [Refs 8th c.BC+] Attic dialectProse and Comedy texts, with future, τάχ᾽ εἴσομαι [Refs 5th c.BC+]; ἔοικα θεσπιῳδήσειν τ. [Refs 4th c.BC+]; πέμψον πρὸς ἐμὲ τ. [Refs 2nd c.AD+]; in this sense not found in [Refs]; τάχα ἐπειδάν, ={ἐπειδὰν τάχιστα}, as soon as, [Refs 5th c.BC+]

__II perhaps, to express any contingency from a probability to bare possibility, δὶς μὲν γὰρ καὶ τρὶς τ. τεύξεαι [Refs 8th c.BC+], probably, perhaps, [Refs 5th c.BC+], frequently in Trag. and Attic dialect; mostly with optative, as [Refs 5th c.BC+]; rarely with aorist indicative, [Refs 5th c.BC+]; with imperfect indicative, [Refs 4th c.BC+]; with participle, [Refs 5th c.BC+]; with infinitive, [Refs 2nd c.AD+]; τάχ᾽ ἄν alone, in answers, [Refs 5th c.BC+]; ἴσως τ. [Refs 5th c.BC+]; ἀμφισβητοῦντες προστιθέασιν ἀεὶ τὸ ἴσως καὶ τ. [Refs 4th c.BC+]; in this sense only twice in [LXX]
__III superlative τάχιστα, see at {ταχύς} with [Refs]
__IV [Refs 5th c.BC+], perhaps-es, “fragment” 869.