The Spanish word 'chero' meaning 'smell' comes from Portuguese 'cheiro' meaning 'smell, aroma'. This Portuguese word developed from the verb 'cheirar' meaning 'to smell', which ultimately traces back to the Latin word 'fragrare' meaning 'to emit odor'. The evolution from Latin 'fragrare' to Portuguese 'cheirar' involved sound changes where the initial 'fr-' cluster shifted to 'ch-', a change that carried through to modern Spanish.

While 'chero' is not extremely common in standard Spanish, you might encounter related words like 'fragante' (fragrant) and 'fragancia' (fragrance), which come from the same Latin root 'fragrare' but followed a different evolutionary path that preserved the original 'fr-' sound.

English speakers might recognize the connection to words like 'fragrant', 'fragrance', and 'perfume', which all ultimately derive from the same Latin root 'fragrare'. While English preserved the 'fr-' sound from Latin, the Portuguese and Spanish development took a different path with the 'ch-' sound. Understanding this connection can help you remember that 'chero' relates to smells and aromas.