(1):

(p. pr. & vb. n.) of Undertake

(2):

(n.) The act of one who undertakes, or engages in, any project or business.

(3):

(n.) A promise or pledge; a guarantee.

(4):

(n.) That which is undertaken; any business, work, or project which a person engages in, or attempts to perform; an enterprise.

(5):

(n.) Specifically, the business of an undertaker, or the management of funerals.