The term 'dead ends' can refer to two different crossword solutions: DEES (4 letters) and IMPASSES (8 letters). Dead ends are a metaphor for a situation in which there is no progress or solution. In the case of DEES, it is an acronym for 'Dead End Streets, ' which are streets that have no outlet and lead nowhere. IMPASSES refers to a situation in which two parties are unable to reach an agreement or compromise. It is a figurative dead end, as neither party can move forward.