Amarna Canaanite

ḳaṣāpu - to be angry (CAD Q 146, Rainey 1996 II 307‒308)

na-aḳ-ṣa-pu in EA 82:51, [na]-aḳ-ṣa-ap-ti in EA 93:5

PNWS
*ḳṣp - to be angry (Kogan 2015:237)
hardly any connection between this root and PWS *ḳṣp ‘to break’ or Akk. kaṣāpu ‘to account?, to wish?, to plan?’. Cf. perhaps Arb raˁdun qāṣifun - šadīdu ṣ-ṣawti