This is the 919th most frequent Hebrew word.
מיום
"Since" or "from the day."
Here, 'מיום' means 'since the day', indicating the starting point of the period since the described event.
מיום שהגעת לכאן, האווירה השתנתה.
Since the day you arrived here, the atmosphere has changed.
Here, 'מיום ליום' expresses ongoing improvement between consecutive days.
מיום ליום אני מרגיש טוב יותר.
From day to day, I am feeling better.
Here, 'מיום שחלף ליום הבא' describes progress or change noted between two consecutive days.