The Spanish word 'legislador' (meaning 'legislator') comes from the Latin word 'legislator', which was formed by combining three elements: 'lex' meaning 'law', 'latum' (the supine form of the verb 'ferre', meaning 'to carry'), and the agent suffix '-tor'. When these elements came together, they literally created a term meaning 'law-carrier' or 'law-giver' - someone who brings or establishes laws. The word evolved from Latin to Spanish, with the typical change of the Latin '-tor' ending to Spanish '-dor', a common pattern in Spanish words derived from Latin agent nouns.

Several common Spanish words share roots with 'legislador'. The word 'ley' (meaning 'law') comes from the same Latin root 'lex'. You might also recognize this root in related Spanish words like 'legal' (legal) and 'legislación' (legislation). The '-dor' suffix appears in many Spanish words to indicate the person who does something, like in 'trabajador' (worker) or 'jugador' (player).

English speakers can easily connect 'legislador' to several familiar English words. The most obvious is 'legislator', which is virtually identical in meaning and form. Other related English words include 'legislation', 'legislative', and 'legal', all derived from the Latin 'lex' (law). The concept of 'carrying' or 'bringing' law (from Latin 'latum') can be seen in English phrases like 'to bring a law' or 'to carry a motion'.