Tigrinya

säḥaḳä - ridere (to laugh) (TED 643, Bassano 1918: 170)

With dissimilation of the two “emphatics”?

PWS
*ṣ̂ḥk/ṣ̂ḥḳ - to laugh (SED I 70ᵥ)
The level of reconstruction is uncertain due to semantic difficulties concerning the possible Akkadian cognate.