A sincere attempt; a determined or assiduous effort towards a specific goal; assiduous or persistent activity.
To work with purpose.
To attempt through application of effort (to do something); to try strenuously.
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.