Puppy plaint is a term used to describe the sound of a puppy's whining or yelping. It is a combination of the two words 'WHINE' and 'YELP', which both have five and four letters respectively. Whining is a high-pitched, drawn-out sound that puppies make when they are feeling distressed or uncomfortable, while yelping is a sharp, short sound that puppies make when they are startled or in pain. Together, these two sounds make up the puppy plaint.