before a vowel, cyt-, word-forming element, from Latinized form of Greek kytos "a hollow, receptacle, basket" (from PIE *ku-ti-, from root *(s)keu- "to cover, conceal"); used in modern science since c. 1859 for "cell," perhaps especially from the sense (in Aristophanes) of "a cell of a hive of wasps or bees."
early 15c. (Chauliac), "bloodshot," from Late Latin sanguinosus "full of blood," from Latin sanguis "blood" (see sanguinary). The meaning "pertaining to blood" is from 1813 and is probably a separate borrowing.
1620s, "characterized by slaughter, attended by much bloodshed;" also bloodthirsty, eager to shed blood, delighting in carnage," from French sanguinaire or directly from Latin sanguinarius "of or pertaining to blood," also, rarely, "blood-thirsty," from sanguis (genitive sanguinis) "blood," a word of unknown origin. Latin distinguished sanguis, the generic word, from cruor "blood from a wound" (related to English raw, from PIE root *kreue-). The classical sense of "pertaining to blood" is rare in English.
"of the same blood, related by birth," c. 1600, from Latin consanguineus "of the same blood," from assimilated form of com "with, together" (see con-) + sanguineus "of blood" (see sanguinary).