"Pertahanan mereka diperlemah penyakit itu."

Translation:Their defense is weakened by that disease.

October 5, 2018

I have used the translation "Their defense is weakened by the disease.", and it was rejected. I have made a report to be added.

So can pertahanan also refer to the immune system?

Yes it actually can

I have used the word "Sickness", for "Disease", why is this marked wrong?

Agree it should be accepted but nobody reads these posts I feel

Shouldn't the word "oleh" needed between "diperlemah" and "penyakit"? -> "Pertahanan mereka diperlemah /oleh/ penyakit itu". If not, why not?

I believe it can be, but is optional.

This would be a better translation: Pertahanan mereka diperlemah oleh penyakit itu.

I have wrong this through a number of grammar checkers ANF Their defences are weakened - is correct as well