Old English siwian "to stitch, sew, mend, patch, knit together," earlier siowian, from Proto-Germanic *siwjanan (cognates: Old Norse syja, Swedish sy, Danish sye, Old Frisian sia, Old High German siuwan, Gothic siujan "to sew"), from PIE root *syu- "to bind, sew" (cognates: Sanskrit sivyati "sews," sutram "thread, string;" Greek hymen "thin skin, membrane," hymnos "song;" Latin suere "to sew, sew together;" Old Church Slavonic šijo "to sew," šivu "seam;" Lettish siuviu, siuti "to sew," siuvikis "tailor;" Russian švec "tailor"). Related: Sewed; sewing. To sew (something) up "bring it to a conclusion" is a figurative use attested by 1904.