keinesfalls
Translation
by no means, under no circumstances, in no case
Examples
Das darfst du keinesfalls tun.
You must under no circumstances do that.
Er ist keinesfalls damit einverstanden.
He is by no means in agreement with it.
Grammar Patterns
[sentence adverb] strongly negates a statement That is by no means the right solution.
Similar Words
keineswegs, auf keinen Fall; Antonyms: auf jeden Fall, unbedingt
Etymology
Composed of 'keines' (genitive of 'kein', no) and 'Falls' (genitive of 'Fall', case). Literally means 'of no case'.
Memory Tips
Think of it as a very strong 'in no case'. The word 'Fall' (case) is the key here.