The Spanish word 'cochino' meaning 'pig' has an interesting onomatopoeic origin. It comes from combining 'cocho', which was a sound used to call pigs (similar to how English speakers might say 'here piggy piggy'), with the Spanish diminutive suffix '-ino'. The diminutive suffix might have been added to make the calling sound more endearing or to refer to smaller pigs, and over time this combination became the standard word for 'pig' in Spanish.

A related Spanish word is 'cochina', which is the feminine form and can be used as both a noun meaning 'female pig' and an adjective meaning 'dirty' or 'filthy' - a meaning that developed from the association of pigs with uncleanliness. The word 'cochinada' is also related, meaning 'filth' or 'dirty trick', showing how the pig-related word evolved to describe unpleasant things or actions.

While there aren't direct English cognates since 'cochino' comes from an onomatopoeia specific to Spanish, English speakers might find it interesting that many languages have pig-related words that originated from the sounds used to call these animals. In English, we have expressions like 'sooey' or 'here piggy' which, while not becoming formal words like 'cochino' did in Spanish, serve a similar function as the original 'cocho' call.