the.com/priority
From the one thing that came first to the seventeen things that all do.
means The thing that matters most right now and therefore gets your time, attention, or resources before anything else.
from From Latin prior, meaning former or first; for 500 years it had no plural, because logically only one thing can be first. The 20th century invented priorities and quietly broke the math.
Singular onlyWas singular for five centuries before going plural.
Latin rootPrior means first, the thing ahead of all.
Self-defeatingNaming ten priorities means you have none.