Choose the word most opposite in meaning to the word 'TURBULENT'.

Turbulent describes conditions of violent disturbance, as in turbulent water or a turbulent period, so the opposite is 'calm'. 'Violent' and 'stormy' are its synonyms and 'rapid' means fast, which is only loosely related. Read the question carefully, since the synonym of the word is almost always included among the options as a deliberate distractor.