The American Heritage® Dictionary of the English Language: Fourth Edition. 2000.
Appendix I
Indo-European Roots
ENTRY:
preus-
DEFINITION:
To freeze, burn. 1.freeze, from Old English frosan, to freeze, from Germanic *freusan, to freeze. 2. Suffixed zero-grade form *prus-to-.frost, from Old English forst,frost, frost, from Germanic *frustaz, frost. 3. Suffixed form *preus-i-.prurient, prurigo, pruritus, from Latin denominative prrre, to burn, itch, yearn for, from *preusis,*preuris, act of burning. 4. Suffixed zero-grade form *prus-wn-.pruinose, from Latin pruna, hoarfrost. (Pokorny preus- 846.)