Lexical Definition

‎פִּיחַ‎ pîyach (pee'-akh) soot ^H:N-M
from ‎פּוּחַ‎

ashes.

• a powder (as easily puffed away), i.e. ashes or dust

1) soot, ashes

Brown-Driver-Briggs

‎פִּיחַ‎ noun [masculine] soot, ᵐ5 αὶθάλη (? wafted about); — construct ‎(הַ)כִּבְשָׁן‎ ‎׳‎‎פ‎ Exod 9:8; Exod 9:10 (P) furnace-soot.

Brown-Driver-Briggs References