Etymology: The lower character is mouth. The upper character is ten.*
Mnemonic: AN OLD STORY, TOLD AT LEAST TEN TIMES.
* Actually an inaccurate explanation. Earlier characters were of a skull-like mask, which was worn at festivals and ceremonies. Skull gave the meaning of old.
復古 (fukko): restoration
古本 (furuhon): secondhand book
(Based upon Henshall, 1998)