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• Vacillate (Verb)
- English Meaning: To be uncertain what to do, or to change often between two opinions.
- Bangla Meaning: দ্বিধা করা; দ্বিধান্বিত হওয়া; দোদুলচিত্ত/দোলায়মান/দোলায়িত/দোদুল হওয়া; আন্দোলিত/দোদুল্যমান হওয়া।

• Synonyms:
- Waver: দোদুল্যমান হওয়া।
- Dither: ইতস্তত করা।
- Hesitate: দ্বিধা/ইতস্তত করা।

• Antonyms:
- decide: সিদ্ধান্ত দেওয়া; মন স্থির করা; ঠিক করা।
- be steadfast: দৃঢ়; অবিচলিত হওয়া।
- be certain: নিশ্চয়তা; সংশয়মুক্ত হওয়া।

• Other forms:
- vacillatingly (adverb)
- vacillator (noun)

• Example Sentence:
1. Her mood vacillated between hope and despair.
2. The president continues to vacillate over foreign policy.

Source:
1. Accessible Dictionary by Bangla Academy.
2. Cambridge Dictionary.
3. Merriam-Webster Dictionary.