The Spanish word 'guasa', meaning 'mockery' or 'jest', comes directly from the Taíno language, where it meant 'lack of grace' or 'mockery'. Taíno was the language spoken by the indigenous Taíno people of the Caribbean islands before European colonization. This is one of several words that Spanish inherited from contact with indigenous American languages during the colonial period. The meaning has remained remarkably stable from Taíno to modern Spanish, continuing to refer to joking or mocking behavior.

Since 'guasa' comes from Taíno rather than Latin or Greek (which are the source of most Spanish vocabulary), there aren't many etymologically related simpler Spanish words. However, Spanish speakers might encounter related forms like 'guasón' (joker, someone who makes fun of others) or 'guasearse' (to joke or mock), which are derived from 'guasa'.

There aren't any etymologically related English words since 'guasa' comes from Taíno, and English didn't borrow this particular word. English speakers learning this word might instead focus on remembering its connection to concepts like 'joke', 'jest', or 'mockery'.