## Etymology
From in- ('not') + decisive, from Latin decisus, past participle of decidere ('to cut off, decide'), from de- ('off') + caedere ('to cut').

## AI Etymology
indecisive comes from in- ('not') + decisive, from Latin decisus, past participle of decidere ('to cut off, decide'), from de- ('off') + caedere ('to cut'). Morphologically, the prefixed shape matters: the initial element belongs to the recorded formation and helps explain the modern form's surface analysis. In present English, the adjective sense is "unable to make decisions, or not producing a clear result", so the historical development ends in a clearly identifiable modern dictionary use. The same base also appears in related forms such as decisive, decide, decision, and indecision, and in derivatives such as indecisively and indecisiveness. Its semantic neighborhood includes irresolute, hesitant, wavering, and vacillating, which helps locate the modern sense without adding a separate etymological claim. The named historical forms include Latin decidere, Latin caedere, and Proto-Indo-European *kh₂eyd-.

## Topics
- Cause, Change & Process
- Word Formation & Derivatives

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