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Antonyms that are in the dictionary are marked in green. Antonyms that are not in the dictionary are marked in red.
Hypersonic missiles, according to in April 2022, are truly unpredictable because of their speed and maneuverability, and the difficulty of tracking some variants due to their low flight pattern.
Source: https://www.slashgear.com/1259044/how-fast-is-hypersonic-flight-and-how-does-it-work/