Translation:She boils the meat so that it becomes tender.
What does the suffix -nya mean? I had taken it to mean his, her, or its, but for the last several lessons, I have been marked incorrect every time I use that translation.
The suffix -nya can also function as a definite article. It can be used to refer to something already known or understood from context. In English you use 'the', and in Indonesian you could translate it to '-nya'.