present participle of work on

The internal mechanism of some device or system. / The parts of a quarry or mine that are being (or has been) worked.

plural of working.

That is or are functioning. / That suffices but requires additional work. / In paid employment. / Of or relating to employment. / Enough to allow one to use something. / Used in real life; practical.

(usually in the plural) Operation; action. / Method of operation. / (arithmetic) The incidental or subsidiary calculations performed in solving an overall problem. / Fermentation.

present participle of work

present participle of work at

Used other than figuratively or idiomatically: see at, work. At one's workplace. / Working, in the process of doing work. / (figuratively) At play, in action.

Third-person singular simple present indicative form of work on

simple past tense and past participle of work on