Synonyms: overcloud, obscure, bedim
Definition: make obscure or unclear
Usage: The distinction was obscured
Similar words: alter, change, modify
Definition: cause to change; make different; cause a transformation
Usage: The advent of the automobile may have altered the growth pattern of the city; The discussion has changed my thinking about the issue
Synonyms: overcloud, cloud over, cloud up
Definition: become covered with clouds
Usage: The sky clouded over