to begin (the more usual word)

start action

the buying, selling and distribution of goods (especially between countries)

start action

to introduce (a new official, professor, passenger ship etc) at a special ceremony; to be the beginning of (something)

begin; install

to cause (a scheme etc) to start working

start, introduce

to make a person known to another, usually by giving her or his name

make known; present

(of prices) the lowest at which goods are to be sold

make known; present