knowl·edge·able 
/ˈnɑ:lɪʤəbəl/ adjective
/ˈnɑ:lɪʤəbəl/ adjective [more knowledgeable; most knowledgeable] : having information, understanding, or skill that comes from experience or education : having knowledge
▪ a knowledgeable person ▪ a knowledgeable observer ▪ He is very knowledgeable about chess. [=he knows a lot about chess]
▪ a knowledgeable person ▪ a knowledgeable observer ▪ He is very knowledgeable about chess. [=he knows a lot about chess]
— knowl·edge·ably /ˈnɑ:lɪʤəbli/ adverb
▪ She spoke knowledgeably on several topics.
/ˈnɑ:lɪʤəbli/ adverb ▪ She spoke knowledgeably on several topics.
