determine
verb [ T often passive ]
uk/dɪˈtɜːmɪn/ usto control or influence something directly, or to decide what will happen:
The number of staff we can take on will be determined by how much money we're allowed to spend.
The company will determine which stores to close by the end of November.
to discover the facts or truth about something:
determine whether/why/how, etc. The office will conduct a follow-up audit to determine whether changes and improvements have been made.