psucho (Greek #5594)
to breathe (voluntarily but gently, thus differing on the one hand from 4154, which denotes properly a forcible respiration; and on the other from the base of 109, which refers properly to an inanimate breeze), i.e. (by implication, of reduction of temperature by evaporation) to chill (figuratively)
KJV usage: wax cold.
Pronounce: psoo'-kho
Origin: a primary verb