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Danish hjerne
Danish isse (cognate)
Danish non (mention)
German Hirn (cognate)
German Gehirn (mention)
Proto-Germanic *hersô (inherited)
Proto-Germanic *herznaz (mention)
Old Danish hiarnæ (inherited)
Old Danish hiærnæ (mention)
Proto-Indo-European *ḱerh₂s- (derived)
Old Norse hjarni (inherited)
Old Norse hjarsi (inherited)

Danish hjernestamme (mention)
Danish storhjerne (compound)
Danish hjernedød (compound)
Danish hjerneforsker (compound)
Danish hjernet (suffix)
Danish klæbehjerne (affix)