to GUEST,JoergThanks for the feedback.
My response was intended to address only the original question, "If there's no word for something, can you think about it at all?" It wasn't intended to address the discussion of "wistful" and "the word-cluster brash/vulgar/course" that followed.
I assumed that if "McGrath of Harlow" wanted an answer to the original question at all, s/he was hoping for a simple answer.
Even though I agree that "things are complicated enough," my only point was that history indicates that an adequate answer to the "simple" question cannot possibly be simple no matter how hard we wish it so.