Repeatable comes from repeat + -able; repeat from Old French repeter, from Latin repetere ('to seek again, repeat'), from re- ('again') + petere ('to seek, aim at'). The historical chain includes Latin repetere and Latin petere. Older glosses in the chain include "to seek again, repeat", "again", and "to seek, aim at", which help explain the semantic range of the modern word. Morphologically, repeatable is best read as compound, suffixal formation, and borrowing, yielding an English adjective shaped by both form history and later usage. In current English it functions as an adjective, with the sense "able to be done or reproduced again with the same result". English derivatives include repeatability; related forms include repeat, repetition, and repetitive. The result is an English adjective whose etymology preserves the older forms while supporting the word's specialized modern meaning.