v. [f. BE- 5 + FOUL: a later formation, which ran parallel to BEFILE in ME., and at length displaced it.] trans. To make foul, cover with filth or dirt; often of moral filth; esp. in the proverbial To befoul one’s own nest.

1

c. 1320.  Cast. Love, 1147. Al was his face bi-foulet wt spot.

2

c. 1430.  Syr Gener., 4610. The last he fond Darel Al befouled in the grauel.

3

1526.  Skelton, Magnyf., 885. I befoule his pate.

4

1726.  Amherst, Terræ Filius, v. 22. ’Tis an ill bird which befouls his own nest.

5

1844.  Macaulay, Chatham, Ess. Fox had stumbled in the mire, and had not only been defeated but befouled.

6

  Hence Befouler, Befoulment.

7

1842.  Ld. Jeffrey, in Napier’s Corr. (1879), 388. A befouler of his own nest.

8

1862.  F. Hall, Hindu Philos. Syst., 272. The ignorant … think the blueness of the sky to be the befoulment of ether.

9