- knowledgeable (adj.)
[knowledgeable 词源字典]
- also knowledgable, c. 1600, "capable of being known, recognizable" (a sense now obsolete), from knowledge in its Middle English verbal sense + -able. The modern sense of "having knowledge, displaying knowledge" is from 1829 and probably a new formation.[knowledgeable etymology, knowledgeable origin, 英语词源]