Antonym of 'Reticent' -

• Reticent: (adjective)
English Meaning: Unwilling to speak about your thoughts or feelings.
Bangla Meaning: স্বল্পভাষী, গুরুগম্ভীর।

Synonyms: Reserved (গুরুগম্ভীর), Introverted (অন্তর্মুখী), Uncommunicative (মুখবোজা; চাপাস্বভাব), Untalkative (নীরব), Silent (মৌন), Bashful (লাজুক)। 
Antonyms: Expansive (উচ্ছল; উচ্ছলিত; উচ্ছলতাপূর্ণ), Garrulous (বাক্যবাগীশ), Communicative(আলাপী), Extroverted (বহির্মুখী), Talkative(বাচাল)। 

Other Forms: 
- Reticently (adverb)
- Reticence [রেটিস্‌ন্‌স্] (noun) [uncountable noun] স্বল্পভাষিতা; বাকসংযম।

Example Sentence: 
1. She was extremely reticent about her personal affairs.
2. I am always reticent to say too much on other folks' blogs for fear of putting my foot in my mouth.

Option,
- Radiant (দীপ্তিমান)

Source: Website Lecture.