frost 
(frôst, frŏst)
(frôst, frŏst)n.
1.
a. A deposit of minute ice crystals formed when water vapor condenses at a temperature below freezing.
b. A period of weather when such deposits form.
2. A cold manner or period of disaffection: a frost in diplomatic relations.
v. frost·ed, frost·ing, frosts
v.tr.
1. To cover with frost.
2. To damage or kill by frost.
3. To cover (glass, for example) with a roughened or speckled decorative surface.
4. To cover or decorate with icing: frost a cake.
5. To bleach or lighten the color of (hair) with dye so that some but not all strands are changed in color.
6. Slang To anger or upset: What really frosted me about the incident was the fact that you lied.
v.intr.
To become covered with frost: The windshield frosted up overnight.
[Middle English, from Old English; see preus- in the Appendix of Indo-European roots.]