A primitive root; to break out (in joyful sound) -- break (forth, forth into joy), make a loud noise.
H6476. patsach
מָּצַח verb cause to break or burst forth, break forth with (compare Arabic break, crush; Ethiopic shatter; Syriac is be joyous, hilarious); —
Qal Perfect3plural רִנָּה מָּֽצְחוּ Isaiah 14:7 they have broken forth with joyous shout; Imperfect רִנָּה יִפְצְחוּ 55:12 (of mountains); Imperative feminine singular רִנָּה מִּצְחִי 54:1 (of Zion); masculine plural ר ׳מִּצְחוּ 44:23; 49:13 Qr (> Kt יפצחו; of mountains); absolute מִּצְחוּ 52:9; Psalm 98:4 (both + רַנְּנוּ).
Pi`el break bones in pieces: Perfect3plural מִּצֵּ֑חוּ Micah 3:3.