The Spanish word 'limpio' meaning 'clean' comes from the Latin word 'limpidus' meaning 'clear, clean'. Going even further back, 'limpidus' derives from the Latin word 'lumpa' which referred to 'clear water'. This shows how the concept of cleanliness in Spanish is historically connected to the idea of clear, pure water.

Some related Spanish words include 'limpiar' (to clean), 'limpieza' (cleanliness), and 'limpidez' (clarity, clearness). All these words maintain the core meaning of cleanliness and clarity from their Latin roots.

The English word 'limpid', meaning 'clear, transparent, or crystal-clear' (especially referring to water or writing style), comes from the same Latin root 'limpidus'. While 'limpid' is somewhat formal or literary in English, it preserves the original Latin meaning of clarity and purity.