From Old English þeorf; akin to Old High German derb, Old Norse þjarfr.
therf (not comparable)
- (obsolete, of bread, loaves, etc.) Not fermented, unleavened.
- 1382–1395, John Wycliffe et al. (translators), Leviticus 2:4:
- Forsothe whanne thou offrist a sacrifice bakun in an ouene of whete flour, that is, loouys without sour dow, spreynd with oile, and therf breed sodun in watir, bawmed with oile; […]