Search Result for "undoable": 
Wordnet 3.0

ADJECTIVE (1)

1. impossible to achieve;
- Example: "an unattainable goal"
[syn: unachievable, unattainable, undoable, unrealizable]



WordNet (r) 3.0 (2006):

undoable
    adj 1: impossible to achieve; "an unattainable goal" [syn:
           unachievable, unattainable, undoable,
           unrealizable]