The act of pursuing.
A hobby or recreational activity, done regularly.
A discipline in track cycling where two opposing teams start on opposite sides of the track and try to catch their opponents.
The act of one who undertakes (in either sense).
A promise or pledge; a guarantee.
That which is undertaken; any business, work, or project which a person engages in, or attempts to perform; an enterprise.
The business of an undertaker, or the management of funerals.