Wordnet 3.0
VERB (1)
1. 
 make less visible or unclear; 
- Example: "The stars are obscured by the clouds"- Example: "the big elm tree obscures our view of the valley"[syn: obscure, befog, becloud, obnubilate, haze over, fog, cloud, mist]
WordNet (r) 3.0 (2006):
haze over
    v 1: make less visible or unclear; "The stars are obscured by
         the clouds"; "the big elm tree obscures our view of the
         valley" [syn: obscure, befog, becloud, obnubilate,
         haze over, fog, cloud, mist]