Being an essential and permanent part of something.
Being an included feature that normally comes as an extra.
Constructed as a non-detachable part of a larger structure.
Anything (such as a piece of furniture, or a software feature) that is built in, not added as an extra.
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).