v. Obs. [OE. forwyrcan, f. FOR- pref.1 + wyrcan to WORK; cf. OS. farwirkian, OHG. firwirken (MHG., mod.Ger. verwirken), Goth. frawaurkjan.]
1. trans. To forfeit (a possession, privilege, etc.), ruin (oneself) by ones own conduct.
a. 1000. Crist, 919 (Gr.).
| He bið þam yflum eȝeslic and grimlic | |
| to ȝeseonne synneȝum monnum, | |
| þam þær mid firenum cumað forð forworhte. | 
c. 1175. Cott. Hom., 221. Þæt wuniunge on hefen rice, þe se deofel forwo[r]hte mid modinesse.
c. 1200. Ormin, 13732.
| Forr affterr þatt ta forrme menn | |
| Adam & Eve hiss macche | |
| Forrwrohhte wærenn ȝæness Godd. | |
| Ibid., 17534. | |
| Hu wærenn þeȝȝ forrwrohhte | |
| To dreȝhenn wa wiþþ mikell rihht | |
| Inn helle wiþþ þe defell? | 
1481. Caxton, Reynard (Arb.), 52. I haue forwrought and angred my frendes.
2. To do wrong to, injure.
c. 1205. Lay., 16693.
| Þat þu hauest þas hæȝe burh | |
| swa swiðe for-worht. | 
3. To overwork, exhaust with toil. Only in pa. pple. Forwrought.
13[?]. E. E. Allit. P., C. 163.
| Þen þo wery for-wroȝt wyst no bote, | |
| Bot vchon glewed on his god þat gayned hym beste. | 
c. 1400. Destr. Troy, 5861. He was very [= wery] for-wroght, & woundet full sore.
c. 1500. Lancelot, 888. So for-wrocht hys lymmys ver ilkon.
1535. Stewart, Cron. Scot., III. 44.
| Werie forwrocht, and richt weilsum of wane, | |
| Greit reuth in hart had for to heir his mane. |