knowledgeable
adj. B2 Upper Intermediate US //ˈnɑɫədʒəbəɫ// UK //nˈɒlɪdʒəbəl// knowl·edge·able
adj. having a lot of information or understanding about a subject. You use this word to describe someone who knows their facts well.
adj. possessing a wide range of factual information or deep understanding of a specific subject. Typically used attributively before a noun or predicatively after a linking verb.
She is very knowledgeable about local history.
The guide was knowledgeable enough to answer every question about the ancient ruins.
His reputation as a knowledgeable expert in maritime law attracted clients from across the Atlantic.
From knowledge + -able.