Search Result for "obsolesce": 
Wordnet 3.0

VERB (1)

1. become obsolete, fall into disuse;
- Example: "This word has not obsolesced, although it is rarely used"



The Collaborative International Dictionary of English v.0.48:

Obsolesce \Ob`so*lesce"\, v. i. [L. obsolescere. See
   Obsolescent.]
   To become obsolescent. [R.] --Fitzed. Hall.
   [1913 Webster]


WordNet (r) 3.0 (2006):

obsolesce
    v 1: become obsolete, fall into disuse; "This word has not
         obsolesced, although it is rarely used"