The Spanish word 'pión' meaning 'young bird' has an interesting onomatopoeic origin. It comes from the Spanish verb 'piar' (to chirp), which itself derives from 'pío', an onomatopoeia representing the sound that birds make. The word was formed by adding the augmentative suffix '-ón' to the verb stem, creating a noun that literally describes a creature that makes lots of chirping sounds - a young bird.

Some simpler related Spanish words include 'pío' (the chirping sound itself) and the verb 'piar' (to chirp). These words are more commonly encountered and share the same onomatopoeic origin. When you hear a bird making 'pío pío' sounds, you can say it's 'piando' (chirping).

While there aren't direct English cognates since this is an onomatopoeic word specific to Spanish, English has its own bird sound words like 'peep' and 'cheep' that serve similar functions. These words, like Spanish 'pío', are also onomatopoeic in nature, though they developed independently.