Wordnet 3.0
VERB (1)
1. 
 make unnecessary an expenditure or effort; 
- Example: "This will save money"- Example: "I'll save you the trouble"- Example: "This will save you a lot of time"[syn: save, make unnecessary]
WordNet (r) 3.0 (2006):
make unnecessary
    v 1: make unnecessary an expenditure or effort; "This will save
         money"; "I'll save you the trouble"; "This will save you a
         lot of time" [syn: save, make unnecessary]