I had to do a bit of digging and found various meanings for "He tasks me", and
believe I was right in the "subject-to-hardship" sense. Because Ceti Alpha V
became uninabitable, Khan lost his wife and suffered hardship and I'd say
"causes to suffer" still works.

It probably could be fairly forced as I was trying for something that would
work for both a whirlpool and some kind of strange flow of something near
Antares. But I'm not sure a {mI'rab} connotes the necessary movement. I think
it needs to be something that will {ver} like a {SuS'a'}, but that also works
for water.