peiə-

To be fat, swell.

Derivatives include fat, pituitary, and Irish.

I. Zero-grade form *pī- (contracted from *piə-).

1. Possibly suffixed form *pī-tu-. pip⁵, pituitary, from Latin pītuīta, moisture exuded from trees, gum, phlegm.

2. Possibly suffixed form *pī-nu-. pine¹, pineal, pinnace, piñon, pinot; piña cloth, from Latin pīnus, pine tree (yielding a resin).

3. Suffixed form *pī-won-. propionic acid, from Greek pīōn, fat.

4. Suffixed form *pī-wer-, “fat, fertile.”

a. Erse, Irish, from Old English Īras, the Irish, from *Īwer-iū, the prehistoric Celtic name for Ireland;

b. Pierian Spring, from Greek Pīeriā, a region of Macedonia, from *Pīwer-iā-.

II. Extended o-grade form *poid-. fat, from Old English fǣt(t), fat, from Germanic past participle *faitidaz, fattened, from derivative verb *faitjan, to fatten, from *faitaz, plump, fat.

 

[Pokorny pei̯(ə)- 793.]

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