aspirate became voiceless stop before [s]; [{ptk}ʰs] > [{ptk}s]

aspirate became voiceless stop before [s]; [{ptk}ʰs] > [{ptk}s]
@@@ continued to be an active change in Q after [kʰ] > [x]: “therefore in PQ [χs] > ks” (PE19/100)

References ✧ PE18/101; PE19/83

Related

Phonetic Rule Elements

[pʰs] > [ps] ✧ PE19/83 (ph-s > ps)
[tʰs] > [ts] ✧ PE19/83 (th-s > ts)
[kʰs] > [ks] ✧ PE19/83 (kh-s > ks); PE19/100 (χs > ks)

ᴹ✶aspirate became voiceless stop before [s]; [{ptk}ʰs] > [{ptk}s]

GS/§4.7 kʰs > ks @@@

References ✧ PE18/53; PE19/40-41

Phonetic Rule Elements

[pʰs] > [ps] ✧ PE19/50 (ph + s > ps)
[tʰs] > [ts] ✧ PE19/50 (th + s > ts)
[kʰs] > [ks] ✧ PE19/50 (kh + s > ks)

Phonetic Rule Examples

lokʰse > lokse kʰs > ks ᴹ√LOKH > ᴹQ. lokse ✧ Ety/LOKH
lokʰse > lokse kʰs > ks ᴹ√LOKH > N. lhaws ✧ Ety/LOKH
kʰotʰsē > kʰotsē tʰs > ts ᴹ√KHOTH > ᴹ✶khotsē ✧ Ety/KHOTH