'Innocuous' means -

• Innocuous (adjective)
English Meaning: Completely without harm.
Bangla Meaning: অনপকারী; নির্বিষ: innocuous snakes/drugs.

Example Sentence:
1. At least one good thing I can say about this ride is that it is fairly innocuous and gentle.
2. Those innocuous lies we must tell every day if society is to remain civil.

Options,
• Distend
English Meaning: (usually of the stomach or another part of the body) to swell and become large, especially because of pressure from inside.
Bangla Meaning: ফোলা বা ফোলানো।

• Indigence
English Meaning: A state of extreme poverty.
Bangla Meaning: দারিদ্র, নির্ধনতা, অকিঞ্চনত্ব।

• Assiduous
English Meaning: Showing hard work, care, and attention to detail.
Bangla Meaning: অধ্যবসায়ী; প্রযত্নবান; নিষ্ঠাবান: assiduous in one’s studies.

Source: Website Lecture.