Why this word is great
LIFEBLOOD — [Noun] The blood considered essential to sustain life, or by extension, any vital or animating element necessary for continued existence or function. From Middle English lyf ("life") + blod ("blood"), literally "life-blood," emphasizing its role as the sustaining force of life. Unlike "essence" (which abstracts intrinsic nature) or "foundation" (which anchors statically), "lifeblood" thrums with movement—a pulse, not a pillar. It is the river that feeds a city, the electricity humming through a grid at midnight, the quiet, ceaseless work of lungs drawing breath after breath. Without it, the world would not just cease to be; it would cease to become.