Probably from Proto-Italic *siskwos, from Proto-Indo-European *sisku- (“dry”), presumably from *seyk-, *sek- (“to dry up”). Cognate with Ancient Greek ἰσχνός (iskhnós), Proto-Celtic *siskʷos, Lithuanian sèkti (“to lower oneself, sink, dry out”), Sanskrit असश्चुषी (asaścuṣī, “not drying up”), though the phonetic details are unclear.
Ćwicz mówienie i zapamiętywanie " siccus " i wielu innych słów i zdań z łaciński .