They divested themselves __________ the burdensome responsibilities by delegating tasks to others.

• Divest someone of something (phrasal verb)
English Meaning: to take something off or away from someone or yourself.
Bangla meaning: - ক্ষমতা কেড়ে নেওয়া, পরিহার করা; পরিত্যাগ করা।

Complete Sentence: They divested themselves of the burdensome responsibilities by delegating tasks to others.

Example Sentence:
1. After the accident, she divested herself of the painful memories by moving to a new city.
2. The politician divested himself of any ties to the scandal to protect his reputation.

Source:
1. Cambridge Dictionary.
2. Accessible Dictionary by Bangla Academy.