Nouns

(n)knowinga clear and certain mental apprehension

Adjectives

(s)knowing, wise, wise toevidencing the possession of inside information
(s)intentional, knowing, deliberatecharacterized by conscious design or purpose“intentional damage”, “a knowing act of fraud”, “a deliberate attempt to provoke a response”
(s)knowledgeable, knowingalert and fully informed“a knowing collector of rare books”, “surprisingly knowledgeable about what was going on”
(s)knowing, knowledgeable, learned, lettered, well-educated, well-readhighly educated; having extensive information or understanding“knowing instructors”, “a knowledgeable critic”, “a knowledgeable audience”