bile

Etymology 1

Mid 16th century, via Middle French, from Latin bīlis (“bile”), possibly from Proto-Indo-European *bʰidrós (“bitter”). See bitter.

noun

1. A bitter brownish-yellow or greenish-yellow secretion produced by the liver, stored in the gall bladder, and discharged into the duodenum where it aids the process of digestion.
2. Bitterness of temper; ill humour; irascibility.
3. Two of the four humours, black bile or yellow bile, in ancient and medieval physiology.
   I shall tire of my Journal if it is to contain nothing but biles and plasters and unguents. 1890, Walter Scott, The Journal of Sir Walter Scott
   He spake out of the Pythonesse, Act. 16. 17. brought downe fire from heauen, and consumed Iobs sheepe 7000. and his seruants, raised a storme, strooke the house wherein his sonnes and daughters feasted with their elder brother, smote the foure corners of it, with the ruine whereof they all were destroyed, and perished: and ouerspread the body of that holy Saint their father with botches[t] and biles from the sole of his foot to the crowne of his head. 1616, Alexander Roberts, A Treatise of Witchcraft

Etymology 2

Obsolete form of boil. Akin to Dutch buil and German Beule, all from Proto-Germanic *būlǭ.

noun

1. (obsolete) A boil (kind of swelling).

verb

1. Pronunciation spelling of boil.
   We pretty near biled ourselves and Miss Euly done got her bes' pink apron stained, an' I dropped Sis Suky's big kitchen spoon in de hogshead of sand […] 1912, Stella George Stern Perry, Melindy, page 130