“Proto-MSA *šṣ̂r ‘to be green’ comes close to Arb. ḫḍr with the same meaning (Lane 754), but the extremely problematic correspondence *š vs. *ḫ makes a straightforward acceptance of this equation rather unappealing (see further Bittner 1915b:67, Bulakh 2004:276‒277). There is no trace of PS *wrḳ ‘to be green’ in MSA.” (Kogan 2015:542)