Purr
A purr was a guttural vocalization made by various types of animals, often used by humanoids as an onomatopoeia. It was often done as an indication of pleasure or happiness. (; )

In 2259 of the alternate reality,  assured Captain  that 's warp core was "purring like a kitten" (i.e. running well). ()

In 2268, Nyota Uhura was delighted when the tribble she held began to purr. Cyrano Jones assured her that it meant the tribble liked her. ()

Cats were well-known for their purring, particularly when petted. In his poem Ode to Spot, Data referred to this sound as "a singular development of cat communications". () Reginald Barclay's cat  also purred. According to Deanna Troi, this trait probably influenced Barclay's decision to make a holographic re-creation of the actual Neelix purr. () Montgomery Scott and Miles O'Brien both compared starship engines to kittens purring; Scott in 2269 (), and O'Brien in 2370 (). (; )

Caitians often purred when they spoke. () 

Guinan's imaginary friend, a Tarcassian razor beast, had "the softest purr you'd ever heard." ()

In 3188, Cleveland Bookers cat Grudge was purring as he and Michael Burnham were talking. ()

See also
 Meow

External link

Linguistics