This makes sense given that "obeisance" can be traced back to the Anglo-French verb "obeir," which means "to obey" and is also an ancestor of our word "obey."
This makes sense - this is logical
given that = when you consider that, if you take into account that...
obeisance can be traced back to
One can trace the word obeisance back to the Anglo-French verb obeir.
=One can go back and find the origins of the word obeisance in the word obeir.
anyone can analyse the structure of this sentence for me? especially this part "this makes sense given that.....". many many thanks.