10th cent. Old Spanish grave "heavy," "serious," "difficult." The meaning of "difficult" was eventually replaced in Old Spanish by difícil. From Latin gravis 'id.'
From Proto-Italic *grawus 'id.' From Proto-Indo-European *gwreh2-u̯s 'id.' From the root *gwreh2- "to be heavy."
Portuguese grave, Catalan greu, French grave, Italian grave, Aromanian greu, Romanian grev
Hellenic Ancient Greek βαρύς (barys) "heavy" (whence bajo
A krāmärts, B krāmär "weight"