The Spanish word 'peludo' meaning 'hairy' comes from combining two elements: the noun 'pelo' (meaning 'hair') and the suffix '-udo' (meaning 'having much of'). The noun 'pelo' itself derives from Latin 'pilus', which also meant 'hair'. When you combine 'pelo' with the augmentative suffix '-udo', you get 'peludo', literally meaning 'having much hair' or 'hairy'.

A simpler and more common Spanish word that's related to 'peludo' is 'pelo' meaning 'hair'. This is a very basic Spanish noun that you'll encounter frequently. You might also see words like 'pelar' (to cut hair), 'pelaje' (fur/coat of an animal), or 'peluquería' (hair salon), all derived from the same root.

While English doesn't have many common words directly related to Latin 'pilus', we do have some technical terms like 'depilatory' (hair removal product), 'pileous' (hairy), and 'pilus' (a hair-like structure in bacteria). These words share the same Latin ancestor as the Spanish 'peludo', though they're mainly used in scientific or medical contexts.