FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

stugnazo στυγνάζω — 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