• The antonym of Obsequious is Domineering.
Obsequious
English Meaning: obedient or attentive to an excessive or servile degree.
Bangla Meaning: মাত্রাতিরিক্ত শ্রদ্ধা প্রদর্শনকারী।
Domineering
English Meaning: asserting one's will over another in an arrogant way.
Bangla Meaning: প্রভুত্বব্যঞ্জক; দাম্ভিক; উদ্ধত।
Meanings of the other options-
• Servile: having or showing an excessive willingness to serve or please others; আজ্ঞাবহ।
• Submissive: obedient or attentive; বশ্য; বাধ্য; অনুগত; বশবর্তী; আজ্ঞানুবর্তী।
• Sycophantic: behaving or done in an obsequious way in order to gain advantage; মোসাহেবি; মোসাহেবসুলভ।
So, from following options, the word 'Domineering' represents the opposite meaning of Obsequious.
Source: Cambridge Dictionary, Accessible Dictionary by Bangla Academy.