Strong’s Greek
G4768 — stugnazo
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
στυγνάζω
stugnazo — pronounced stoog-nad'-zo
from the same as 4767; to render gloomy, i.e. (by implication) glower (be overcast with clouds, or sombreness of speech):--lower, be sad. see GREEK for 4767
1 occurrence in the KJV.
Mark 10:22
And he was sad at that saying, and went away grieved: for he had great possessions.