Wordnet 3.0
ADVERB (1)
1. 
 to some (great or small) extent; 
- Example: "it was rather cold"- Example: "the party was rather nice"- Example: "the knife is rather dull"- Example: "I rather regret that I cannot attend"- Example: "He's rather good at playing the cello"- Example: "he is kind of shy"[syn: rather, kind of, kinda, sort of]
WordNet (r) 3.0 (2006):
kinda
    adv 1: to some (great or small) extent; "it was rather cold";
           "the party was rather nice"; "the knife is rather dull";
           "I rather regret that I cannot attend"; "He's rather good
           at playing the cello"; "he is kind of shy" [syn:
           rather, kind of, kinda, sort of]