feather
noun /ˈfeðə(r)/
  /ˈfeðər/
Idioms - one of the many soft light parts covering a bird’s body
enlarge image- a peacock feather
 - tail/flight/wing feathers
 - a feather pillow (= one containing feathers)
 
Extra ExamplesTopics Birdsb2- I had to pluck the dead hen's feathers.
 - Its feathers were ruffled by the chill breeze.
 - The chicks have grown their adult feathers.
 - The owl fluffed out its feathers.
 - a fledgling with new flight feathers
 - a swan preening its feathers
 - the downy feathers on the duck's breast
 
Oxford Collocations Dictionaryadjective- breast
 - neck
 - tail
 - …
 
- preen
 - fluff
 - fluff out
 - …
 
- bed
 - mattress
 - pillow
 - …
 
- as light as a feather
 
Word OriginOld English fether, of Germanic origin; related to Dutch veer and German Feder, from an Indo-European root shared by Sanskrit patra ‘wing’, Latin penna ‘feather’, and Greek pteron, pterux ‘wing’. 
Idioms 
birds of a feather (flock together) 
- (saying) people of the same sort (are found together)                                     
 
a feather in your cap 
- an action that you can be proud of
 
ruffle somebody’s/a few feathers 
- (informal) to annoy or upset somebody or a group of people
- The senator's speech ruffled a few feathers in the business world.
 
 
smooth (somebody’s) ruffled feathers 
- to make somebody feel less angry or offended
 
you could have knocked me down with a feather 
- (informal) used to express surprise
 
