What is the meaning of Revelation 6:10?

* The two F.O.G. Bibles & Commentary below are currently a work in progress.

And they cried out in a loud voice, “How long, O Lord, holy and true, until You avenge our blood and judge those who dwell upon the earth?”

Berean Standard Bible (BSB)

They cried with a loud voice, saying, “How long, Master, the holy and true, until you judge and avenge our blood on those who dwell on the earth?”

World English Bible (WEB)

And{G2532} they cried{G2896}{(G5707)} with a loud{G3173} voice{G5456}, saying{G3004}{(G5723)}, How{G2193} long{G4219}, O Lord{G1203}, holy{G40} and{G2532} true{G228}, dost thou{G2919} not{G3756} judge{G2919}{(G5719)} and{G2532} avenge{G1556}{(G5719)} our{G2257} blood{G129} on{G575} them that dwell{G2730}{(G5723)} on{G1909} the earth{G1093}?

Strong's King James

(10) Their voice cried out loudly, saying, "Until when אָדוֹן Adonai, holy and firmly-true do You not judge and avenge our blood upon them living on the land?"

The F.O.G*

[10] They cried out with passionate intensity, "Holy and true Master, how long until You judge the inhabitants of earth and avenge our blood?"

The F.O.G Paraphrase

and they were crying with a great voice, saying, ‘Till when, O Master, the Holy and the True, dost Thou not judge and take vengeance of our blood from those dwelling upon the land?’

Young's Literal Translation