The term 'let down' can be defined by the following crossword solutions: deflated (8 letters), FAIL (4 letters), DISILLUSIONED (13 letters), LOWER (5 letters), EXPOSE (6 letters), soured (6 letters), DEFLATE (7 letters), lowered (7 letters), DISAPPOINT (10 letters), DISAPPOINTED (12 letters), and SOPHISTICATE (12 letters). These words all describe a feeling of disappointment or failure, either in oneself or in another person. Deflated and DEFLATE refer to a decrease in size or intensity, while FAIL and LOWER suggest a lack of success or a decline in status. DISILLUSIONED and DISAPPOINTED both refer to a sense of being let down by someone or something, while soured and EXPOSE imply a sense of betrayal or exposure of a truth that was previously hidden. Finally, SOPHISTICATE implies a sense of sophistication or maturity that has been lost due to a let down.