fossil
noun /ˈfɒsl/
  /ˈfɑːsl/
- the parts of a dead animal or a plant that have become hard and turned into rock化石 - fossils over two million years old两百多万年的化石 
 
- fossils over two million years old
- (informal, disapproving) an old person, especially one who is unable to accept new ideas or adapt to changes老人;(尤指)老顽固,老古董 
词源mid 16th cent. (denoting a fossilized fish found, and believed to have lived, underground): from French fossile, from Latin fossilis ‘dug up’, from fodere ‘dig’.