From my fave (partially because it includes fave) dictionary (Amer. Herit. 4 Ed.):
Usage Note: The word dour, which is etymologically related to duress and endure, traditionally rhymes with tour. The variant pronunciation that rhymes with sour is, however, widely used and must be considered acceptable.
From my fave (partially because it includes fave) dictionary (Amer. Herit. 4 Ed.):
Usage Note: The word dour, which is etymologically related to duress and endure, traditionally rhymes with tour. The variant pronunciation that rhymes with sour is, however, widely used and must be considered acceptable.