A word appearing as ᴱQ. sistina “ulcerated, sore” in the Qenya Lexicon of the 1910s, an adjectival form of ᴱQ. sist “ulcer, sore” (QL/86).
Neo-Quenya: I’d retain ᴺQ. sistina “ulcerated, sore” for purposes of Neo-Quenya based on a Neo-Root ᴺ√SISTI. This adjective can only refer to an actual injury, rather than simple aching muscles from overexertion.
*sistë* (sisti-) may be a possible phonological updating of the "Qenya" noun sist (sisty-) "ulcer". Adj. sistina** "ulcerated" (QL:86)