Of critical importance to the success of a particular endeavor.
Having death as a possible or even likely outcome; perilous.
Of critical importance to the survival of a living organism.
Of greatest importance; primary.
Being the first in time or in history.
Being one of the pieces of meat initially separated from the carcass during butchering, prior to division into smaller cuts.
To take part in primal therapy.
A primal cut (of meat).