Up On = location that is elevated (e.g. Up on the mountain, there is plenty of fresh air.) Upon = a formal and antiquated version of the word ‘on’, and sometimes “used to show that something happens soon after, and often because of, something else.”* (e.g. Upon seeing her test grade, she contacted the teacherContinue reading “Up On vs Upon”
These words are the same, you can use them interchangeably. Inquire is more commonly used. When you are writing for a British audience, you would use enquiry as ‘ask’ and inquiry for formal investigations.