Etymology of the French word isobathe
the French word isobathe
derived from the Greek word isobathes, ἰσοβαθής
derived from the Greek word bathos, βάθος (depth; profundity; extent; mystery; a bath, or measure for liquids; a brier shrub)
derived from the Greek word bathus, βαθύς (profound (as going down), literally or figuratively)
using the Greek prefix iso-, ἰσο-