dented β having a surface containing a hollow or dip
dimpled β a small, natural hollow area or crease, permanent or transient, in some soft part of the human body, especially one formed in the cheek in smiling.
dipped β to plunge (something, as a cloth or sponge) temporarily into a liquid, so as to moisten it, dye it, or cause it to take up some of the liquid: He dipped the brush into the paint bucket.
excavated β Simple past tense and past participle of excavate.
hollow β having a space or cavity inside; not solid; empty: a hollow sphere.
hollowed β having a space or cavity inside; not solid; empty: a hollow sphere.
incurvated β Simple past tense and past participle of incurvate.
round β having a flat, circular surface, as a disk.
rounded β having a flat, circular surface, as a disk.
sagging β to sink or bend downward by weight or pressure, especially in the middle: The roof sags.
sinking β to displace part of the volume of a supporting substance or object and become totally or partially submerged or enveloped; fall or descend into or below the surface or to the bottom (often followed by in or into): The battleship sank within two hours. His foot sank in the mud. Her head sinks into the pillows.
sunken β having sunk or been sunk beneath the surface; submerged.
bent β Bent is the past tense and past participle of bend.