What does 'Sage' most closely mean?

Sage (noun)
English Meaning: Wise, especially as a result of long experience.
Bangla Meaning: জ্ঞানী লোক; মহাপ্রাজ্ঞ; ঋষি; প্রজ্ঞী।

Hence, the word 'Sage' most closely means - Wise and judicious.

Synonyms: Expert (বিশেষজ্ঞ বা দক্ষ ব্যক্তি), Guru (গুরু), Mentor (বিজ্ঞ পরামর্শদাতা), Smart(বুদ্ধিমান), Clever(কৌশলী)।  

Antonyms: Fool (মূর্খ), Foolish (মূর্খতাপূর্ণ), Unwise (বোকা), Idiot (নির্বোধ)।

Example Sentence:
1. I want children to grow up under the influence of the wisdom of the ancient sages.
2. A sage suggests that she thinks long and hard before deciding to marry at such a young age.

Source: Lecture.