Wordnet 3.0
VERB (1)
1. 
 do something repeatedly and showing no intention to stop; 
- Example: "We continued our research into the cause of the illness"- Example: "The landlord persists in asking us to move"[syn: continue, persist in]
WordNet (r) 3.0 (2006):
persist in
    v 1: do something repeatedly and showing no intention to stop;
         "We continued our research into the cause of the illness";
         "The landlord persists in asking us to move" [syn:
         continue, persist in]