Probably related to Gez. ṣabˀa ‘to cease, to disappear, to be left, omitted’, suggesting a non-etymological ṣ in the accepted Geez orthography. Of interest is, further, Arb. ḍbˀ ‘to cleave to the ground, to hide, to conceal oneself’. This comparison would imply that the Soqotri verb (stem IV) is a causative transformation of a meaning like “to be left, abandoned”. Certainly no connection to PS *ṣby ‘to wish’ (contra LS 359), unsuitable both phonologically and semantically.