Quiz: Remember the definition of mal de mer?
c.1400, from Old English inra, comp. of inne (adv.) "inside" (see in). Cf. Old High German innaro, German inner. An unusual evolution for a comparative, it has not been used with than since Middle English. Inner tube in the pneumatic tire sense is from 1894. Inner city, in reference to poverty and crime, is attested from 1968.