The term PET PLAINT is a crossword solution composed of two words. The first word, 'PET, ' is a four-letter noun meaning an animal kept as a companion or for pleasure. The second word, 'PLAINT, ' is a six-letter noun meaning a formal complaint or lamentation. Together, the two words form a phrase that can be used to describe the sound a PET makes when it is unhappy or in distress. The crossword solution MEOW is a four-letter word that is often used to represent the sound a cat makes, and is thus a fitting answer to the term PET PLAINT.