Strong’s Greek
G5594 — psucho
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ψύχω
psucho — pronounced psoo'-kho
a primary verb; 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):--wax cold. see GREEK for 4154 see GREEK for 109
1 occurrence in the KJV.
Matthew 24:12
And because iniquity shall abound, the love of many shall wax cold.