Berean Standard Bible (BSB)
through which the world of that time perished in the flood.
World English Bible (WEB)
by which means the world that then was, being overflowed with water, perished.
Strong's King James
Whereby{G1223}{G3739} the world{G2889} that then was{G5119}, being overflowed{G2626}{(G5685)} with water{G5204}, perished{G622}{(G5639)}:
The F.O.G *
(6) Through which the world at that time was destroyed, inundated with flood water.
The F.O.G Message *
Young's Literal Translation
through which the then world, by water having been deluged, was destroyed;