The word 'Elocution' means -

• Elocution (noun)
English Meaning: the ability to speak clearly and correctly, especially in public and pronouncing the words in a way that is considered to be socially acceptable.
Bangla Meaning: বাচনভঙ্গি।
অপরদিকে,
• Oratory (noun)
English Meaning: the skill of making powerful and effective speeches in public.
Bangla Meaning: বাগ্মিতা; বাগাড়ম্বর।

Other options:
• Depreciation
English Meaning: a decrease in value over a period of time
Bangla Meaning: অপ্রসন্নতা বোধ ও প্রকাশ করা; অনুমোদন না করা।

• Appeal
English Meaning: a deeply felt request for money, help or information that is needed immediately, especially one made by a charity or by the police.
Bangla Meaning: সনির্বন্ধ আবেদন করা।

• Fragile
English Meaning: easily broken or damaged
Bangla Meaning: ভঙ্গুর; ঠুনকো; পলকা; ক্ষণভঙ্গুর; নশ্বর; নাজুক।

Source: accessible & cambridge dictionary.