The Spanish word 'gago' meaning 'stutterer' comes from the onomatopoeic root 'gag-', which imitates the sound of stuttering or stammering. This is a clear example of sound symbolism, where the word's sound directly represents what it describes. The repetitive nature of the 'g' sound in 'gago' mirrors the repetitive sounds often associated with stuttering.

There are several Spanish words that share this onomatopoeic root, such as 'gagear' (to stutter) and 'gaguear' (to stammer). These words all maintain the connection to speech impediments and share the characteristic 'gag-' sound pattern that mimics stuttering.

While not directly related, English has similar onomatopoeic words for stuttering sounds. The word 'gag' in English, though primarily meaning 'to choke' or 'retch', captures a similar sound of interrupted speech or throat sounds. Another example is the informal term 'gaga,' which, while having a different meaning (foolish or senile), shares the repetitive sound pattern characteristic of speech difficulties.