Words

Syriac
srd - to be frightened (LSyr. 497, SL 1042)
Syriac
srāmā - flat nosed (LSyr. 499, SL 1048)
Syriac
srāmūtā - being flat nosed (LSyr. 499, SL 1048)
Syriac
srp - to sip, to absorb (LSyr. 500, SL 1049)
Syriac
sūstā, sāsā - mare; kind of worms which infest the grape vine (LSyr. 465, SL 986)
Syriac
sūsyā - horse (LSyr. 464, SL 986)
Syriac
setrā - secret (LSyr. 502, SL 1053)
Syriac
sattā - vine (LSyr. 502, SL 1051)
Syriac
šṭārā, ˀešṭārā - deed, document (LSyr.:773; SL 1549)

The word has no verbal exponent. Usually considered to be an Akkadian loanword. 

Syriac
sṭāpā - incisio (incision) (LSyr. 468)