Strong's Definition
from 2790 in the sense of silence; quiet, i.e. sultry (as feminine noun, the sirocco or hot east wind)
KJV Usage: vehement
STEPBible — Tyndale Abridged Hebrew Lexicon
חֲרִישִׁי (cha.ri.shi) — scorching. harsh, hot, sultry, silent (meaning uncertain)
UBS Dictionary of Biblical Hebrew
adj
Hot
hot (wind), scorching (wind) meaning unsure; possibly: = state of intense heat; ► resulting in suffering or burning
UBS Dictionary of Biblical Hebrew © United Bible Societies, licensed CC BY-SA 4.0.
Brown-Driver-Briggs Hebrew Lexicon
[חֲרִישִׁי] adj. meaning wholly dub.; only Jon 4:8; a silent east wind is not suitable in context; still = sultry is mere conjecture ref