puff-puff
/ˈpʌfpʌf/noun
The sound of repeated puffing by a steam engine; (especially in children's language) a steam locomotive or steam train.
Origin
Mid 19th century. Imitative. Compare puff. Compare also earlier puffer.
- natural color
- natural-colored
- natural colour
- natural-coloured
- natural day
- natural deduction
- natural disaster
- naturalesque
- natural fiber
- natural fibre
- natural food
- natural fool
- natural foundation
- natural frequency
- natural gas
- natural gas liquid
- natural gender
- natural glass
- natural heat
- natural high
- natural historian
- natural-historical
- natural history
- Natural History Museum
- natural horn