The antonym of 'Inimical' is-

The antonym of 'Inimical' is- Friendly.

Inimical (Adj)
Bangla Meaning: বৈরী; প্রতিকূল; অননুকূল; অহিতকর; অপরকারী; ক্ষতিকর।
English Meaning: being adverse often by reason of hostility or malevolence.

Friendly (Adj)
Bangla Meaning: বন্ধুত্বপূর্ণ; বন্ধুজনোচিত; বন্ধুভাবাপন্ন।
English Meaning: showing kindly interest and goodwill.

Other options:
ক) Hostile
Bangla Meaning: শত্রুপক্ষীয়; বৈরী।
English Meaning: of or relating to an enemy.

গ) Indifferent
Bangla Meaning: নিঃস্পৃহ; অনীহ; উদাসীন; নিরুৎসুক।
English Meaning: marked by a lack of interest, enthusiasm.

ঘ) Angry
Bangla Meaning: ক্রুদ্ধ; রুষ্ট।
English Meaning: feeling or showing anger.

Source: Merriam-Webster Dictionary, Accessible Dictionary.