Letting off steam is a phrase used to describe the act of releasing built-up emotions or energy. The crossword solutions for the term LET OFF STEAM are VENT (4 letters), HISS (4 letters), RANT (4 letters), VENTED (6 letters), and ERUPT (5 letters). Venting is the act of expressing one's feelings, usually in an emotional way. Hissing is a sound made by exhaling sharply through pursed lips. Ranting is a form of venting that is more intense and often involves shouting. Vented is the past tense of VENT, meaning to have expressed one's feelings. Erupting is an explosive release of energy, often accompanied by loud noises.