The verb form of 'danger' is-

Correct Answer: (D) endanger Word formation — specifically converting a noun into its verb form — is a regularly tested vocabulary skill in NTRCA exams. "Danger" → Verb Form: — The correct verb form of the noun "danger" is: endanger — Structure: en- (prefix) + danger (noun) = endanger (verb) — Meaning: to put someone or something at risk; to threaten the safety of — Example: "Pollution endangers marine life." — Example: "Reckless driving endangers lives." The prefix "en-" / "em-": The prefix "en-" converts nouns and adjectives into verbs: — danger → endanger — courage → encourage — power → empower — rich → enrich — large → enlarge — bold → embolden — slave → enslave Why others are wrong: ✗ "dangered" — no such standard English verb form; adding -ed to a noun directly is incorrect ✗ "endangered" — this is the PAST TENSE/PAST PARTICIPLE or ADJECTIVE form of endanger (e.g., "an endangered species"), not the base verb form ✗ "indanger" — not a real English word; "in-" is not used with "danger" as a verb prefix Note on "Endangered": "Endangered" is the adjective/participial form (e.g., "endangered species"), while "endanger" is the base verb. Source: Oxford Learner's Dictionary; Word Formation in English; NTRCA Question Bank.