There are some spam issues in the comments, so I had to disable comment editing for a short time. It'll be back once the spam bots are gone. FYI... they leave a comment with "great" and then edit in the spam stuff later, to get around the filter.
(Old fashioned, high register word for doing (and finishing) work. ONLY used in a bunch of fixed phrases that include a synonym for work or task. Not to be used in daily life!)