skin, fur, or hide of humans or animals; leather; peel or bark of plants

rubber or items made from rubber

naughty; mischievous; unruly

the surface or outer layer of something; a wrapper; a cover

indifferent to criticism or scolding due to constant exposure; thick-skinned; case-hardened

something thin and flat, such as a sheet or a thin piece

having lost crispness and become soft, tough, or soggy; chewy

(bound form) a prefix meaning one trillionth

a Chinese surname

an outer covering, wrapper, or protective case