Krv
Krv is the word for blood in several South Slavic languages, including Croatian, Bosnian, Serbian (in both Latin and Cyrillic scripts), and Slovene. It derives from the Proto-Slavic root *krvъ and is cognate with related forms such as Russian krev’ (кровь) and Czech krev. The exact spelling varies by language, but the meaning is the same: the vital bodily fluid. In everyday and medical usage, krv forms the basis for many terms: krvna grupa (blood type), krvni tlak (blood pressure), krvna plazma (blood plasma). In cultural and literary contexts, blood is a common motif associated with life, kinship, and heritage in Slavic traditions. As an acronym, krv may also appear as an initialism for various organizations or codes in different contexts; without context its meaning is uncertain.