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Also includes a formOf array indicating if the word is itself an inflection of another lemma, plus metadata like source URL, license, and data freshness timestamp.","failureModes":["Word not found in Wiktionary returns empty or null entries","Non-English words may return no results or degraded data","Highly archaic or rare words may have incomplete form coverage","Misspelled input returns no matches","Ambiguous words with multiple etymologies may return partial or inconsistent forms"],"whenToPreferThis":"Choose this endpoint when you need structured morphological data for English words — specifically their inflected forms by part of speech or the base lemma of an inflected form. Prefer this over a full dictionary definition endpoint when you only need morphology (not definitions or etymology), or when normalizing tokens in NLP pipelines. It is particularly valuable for irregular forms like 'went'→'go' or 'mice'→'mouse' that rule-based stemmers miss.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-11-02T18:32:59.958Z","isFirstParty":false,"canonicalSlug":"word-forms-and-inflections-lookup-cd12ada9"}