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Correct answer: desultory.
Complete sentence: The team's desultory performance resulted in a significant loss.
- দলের এলোমেলো পারফরম্যান্সের ফলে উল্লেখযোগ্য ক্ষতি হয়েছে।

Desultory (adjective)
- English Meaning: Without a clear plan or purpose and showing little effort or interest.
- Bangla Meaning: উদ্দেশ্যহীন; অসংলগ্ন; এলোমেলো; বিক্ষিপ্ত: desultory reading.

Other options:
ক) Steady
- English meaning: firm in position: fixed.
- Bangla meaning: দৃঢ়ভাবে স্থাপিত বা প্রতিষ্ঠিত; সুষম।

খ) Stable
- English meaning: firmly fixed or not likely to move or change.
- Bangla meaning: দৃঢ়, সুস্থিত; সহজে পরিবর্তনীয় নয়।

গ) Abstemious
- English Meaning: Not self-indulgent, especially when eating and drinking.
- Bangla Meaning: বিশেষত পানাহারে সংযত; মিতাহারী; সংযমী।

Source:
1. Accessible Dictionary by Bangla Academy.
2. Merriam-Webster Dictionary.
3. Oxford Learner's Dictionaries.