Which term describes a muslim's journey to the sacred city of mecca?

The answer is"Hajj".

The Hajj is a yearly Islamic journey to Mecca and it is also known as the third pillar of Islamic ideology (one of five pillars), his is a journey to the holiest city for Muslims, and a compulsory religious obligation for Muslims that must be completed at least once in their lifetime by every single grown-up Muslim who are physically and monetarily equipped for undertaking the excursion. It is not binding upon those who do not possess the power either financial or physical to undertake the journey.  The Hajj is performed in the Islamic month of “Zil-Hajj”, precisely on the 10th of this Islamic month.

well its is frequent rain

have a good day