Lexical Definition

‎פָּלַשׁ‎ pâlash (paw-lash') to wallow H:V
a primitive root

roll (wallow) self.

1) to roll
1a) (Hithpael) to roll in ashes or dust (as an act of mourning)

See Greek: κόπτω · στρώννυμι · ὑποστρώννυμι

Usage: 4 forms in 4 verses
Form Translated As     In Verse(s)
יִתְפַּלָּֽשׁוּ they will roll Ezek.27.30
וְהִתְפַּלְּשִׁ֣י and roll Jer.6.26
וְהִֽתְפַּלְּשׁוּ֙ and roll in ashes Jer.25.34
הִתְפַּלָּֽשִׁי roll yourself Mic.1.10

Brown-Driver-Briggs

[‎פָּלַשׁ‎] verb Hithpa`el act of mourning, possibly roll in (dust, etc.; weakened from burrow into) (Late Hebrew Pi`el break open, or through; Assyrian palâšu, dig a hole; Syriac dig or break through; but connection dubious, Vrss mostly be-sprinkle oneself, Aq roll oneself); — Perfect 1 singular ‎עָפָר‎ ‎הִתְפַּלָּ֑שְׁתִּי‎ Mic 1:10 Kt (Qr Imperative ‎פַּלָּ֑שִׁי‎-), others masculine plural ‎פַּלָּ֑שׁוּ‎-); Imperfect 3 masculine plural ‎בָּאֵפֶר יִתְפַּלָּ֑שׁוּ‎ Ezek 27:30, so Imperative feminine singular ‎הִתֵפַּלֵּשִׁי בָאֵפֶר‎ Jer 6:26 (compare Mic 1:10 Qr); absolute, masculine plural ‎הִתֵפַּלְּשׁוּ‎ Mic 25:34.

Brown-Driver-Briggs References

Book Refs
Jeremiah 6:26
Ezekiel 27:30
Micah 1:10 · 25:34