job, profession, trade / skill / machine, device, loom

profession, trade (practitioners of a profession collectively, those who perform a particular kind of skilled work); guild

loom (weaving frame)

to be experienced

the tricks of the trade

(informal) practice makes perfect, you'll get better, you learn from your mistakes

(euphemistic) the world's oldest profession

all work is noble, no profession is without merit

horses for courses, the cobbler should stick to his last, each to their own trade, stick to what you know

plural of métier