Marrow — From Germanic to English | etymologist.ai
marrow
/ˈmæroʊ/·noun·c. 700·Established
Origin
From OldEnglish 'mearg,' from PIE *mosgho- — the ancient word made no distinction between bone marrow and brain.
Definition
The soft, fatty tissue filling the cavities of bones, responsible for producing blood cells; also, the essential part or innermost meaning of something.
The Full Story
GermanicOld Englishwell-attested
From OldEnglish mearg or mearh (marrow, bone marrow), from Proto-Germanic *mazgą (marrow), from PIE *mosgʰo- (marrow, brain). ThePIE root connects bone marrow and brain tissue as the same substance — the soft, vital, semi-fluid matter housed inside hard structures, whether bone or skull. This semantic equation of marrow andbrain persisted in Germanic languages
Did you know?
The PIE word *mosgʰo- meant both 'marrow' and 'brain' — ancient peoples saw no distinction between the soft tissue inside bones and the soft tissue inside skulls. Russian 'mozg' (мозг, brain) comes from this sameroot. So English 'marrow' and Russian 'brain' are the same word — one language kept the bone-marrow
— Aristotle located the source of semen in the marrow, and the metaphorical use of marrow to mean the innermost essence of a thing (the marrow of the law, to the marrow of his bones) reflects this ancient association with vital core substance. The