sbubs

སྦུབས
inner space/ hollow space/ cavity/ enclosure/ matrix; encompassing sphere; isc. embrace; bud; cocoon (in negative sense); isc. confines; isc. (en)shroud(ing overlay) [RB]

1) [p ! sbub pa] placed upside down [on the ground]; 2) sbubs ma; 3) egg; 4) pho mtshan gyi 'bras bu, cocoon, sphere, space, shell, confine, hollow, -ness, narrow space, narrowness, cavity, confine, "womb" [IW]

confine, shell, "womb"; cocoon, sphere, space, shell, confine, hollow, -ness, narrow space, narrowness, cavity; a hollow sphere; shell, interior, hollow; imp. of sbub pa; inner space/ hollow space/ cavity/ enclosure; bud; cocoon (in negative sense); kha sbubs upside-down [RY]

realm, life, sphere, envelopment, interior, dimension [JV]