She felt deeply aggrieved ________ being overlooked for the promotion.

• Aggrieve (at/over something)
English meaning: Feeling resentment at having been unfairly treated.
Bangla Meaning: অন্যায় ব্যবহারে ক্ষুব্ধ হওয়া/ক্ষোভ বোধ করা।

• অর্থাৎ, কোনো কিছুর উপরে ক্ষুদ্ধ বুঝাতে Aggrieve এরপর preposition হিসাবে at বসে।

Complete sentence: She felt deeply aggrieved at being overlooked for the promotion.

Example Sentence:
1. Many residents were aggrieved at the sudden increase in property taxes.
2. He was aggrieved at the unfair criticism he received from his colleagues.

Source:
1. Oxford Dictionary.
2. Accessible Dictionary Bangla Academy.