Questions & Answers about המערכת מחייבת להקליד קוד חדש.
Because the subject is המערכת (the system), and מערכת is a feminine singular noun in Hebrew.
So the verb has to agree with it:
- המערכת מחייבת = the system requires
- If the subject were masculine, you would expect מחייב
This is very common in Hebrew: verbs in the present tense agree with the subject in gender and number.
Here, מחייבת means requires, obliges, or makes it necessary.
It comes from the root used in לחייב, which can mean things like:
- to require
- to obligate
- sometimes to charge (for money), in other contexts
In this sentence, the meaning is clearly:
- המערכת מחייבת... = the system requires...
So the context tells you it is not about money here.