schlagfertig
quick-witted
Having the ability to react quickly, wittily, and aptly to a comment or situation.
Sie ist für ihre schlagfertigen Antworten in Diskussionen bekannt.
She is known for her quick-witted replies in discussions.

quick-witted
Loading your saved state.
quick-witted
Having the ability to react quickly, wittily, and aptly to a comment or situation.
Sie ist für ihre schlagfertigen Antworten in Diskussionen bekannt.
She is known for her quick-witted replies in discussions.

The word consists of 'Schlag' (as in 'ein Schlag' — a blow) and 'fertig' (ready). So, figuratively speaking, a 'schlagfertige' (quick-witted) person is 'ready to strike back verbally' — they can answer quickly and aptly.
Mit seiner schlagfertigen Art findet er immer die richtigen Worte.
With his quick-witted manner, he always finds the right words.
'Schlagfertig' (quick-witted) can describe not only a person (adjectivally), but also the manner of an action (adverbially). In that case, it usually stands directly with the verb.
Auf die freche Frage hat er schlagfertig geantwortet.
He gave a quick-witted reply to the cheeky question.
'Schlagfertig' (quick-witted) is often combined with verbs of speaking and reacting. Typical phrases are 'schlagfertig antworten' (to answer quick-wittedly), 'schlagfertig reagieren' (to react quick-wittedly), or 'schlagfertig kontern' (to counter quick-wittedly).
In der Debatte konnte sie auf jeden Einwand schlagfertig reagieren.
In the debate, she was able to react quick-wittedly to every objection.
funny
'witzig' and 'schlagfertig' can both have to do with humor in a conversation. 'witzig' generally describes that a person, a sentence, or a situation is funny. 'schlagfertig' describes a particular ability: someone responds quickly, appropriately, and often wittily to a comment. Learners may confuse the words because a quick-witted reply is often funny. But not everything funny is 'schlagfertig'. A film can be 'witzig', but not 'schlagfertig'. A person is 'schlagfertig' when they find a good reply at the right moment.

Felix ist schlagfertig und hat in Diskussionen sofort eine passende Antwort.
Felix is quick-witted and always has an appropriate answer ready in discussions.
Wir fanden die kleine Szene im Theater besonders witzig.
We found the little scene in the theater especially funny.