The Spanish word 'masturbación' comes directly from the Late Latin word 'masturbatio', maintaining essentially the same meaning and form. This is a relatively straightforward borrowing where the Latin ending '-tio' was adapted to the Spanish '-ción', following a common pattern for words of Latin origin in Spanish.

There aren't many common, simpler Spanish words that are etymologically related to 'masturbación', as it stands relatively isolated in terms of its word family in Spanish.

English speakers will readily recognize the cognate 'masturbation', which shares the same Late Latin ancestor 'masturbatio'. Both the Spanish and English words have maintained very similar forms and identical meanings, making this an easy connection for English speakers learning Spanish.