inward, recess curved lines grid, mesh. incline compress hollow, indent, dent distortion. compression, depression negative space

abstract abyss axial cavern cavity chasm cleft compress compression curved decline decrease deform delve dent depression descend diminish dip dipped distortion downward element fall free gap geometric grating grid hole hollow illustration immerse incline indent inset inward lattice lines low lower mash matrix mesh negative net pattern pit plumb plummet push recess rift royalty sink sinus slump space stripe trellis vacuum vanish vector void warp web