The negative particles are οὐ and μή.
- οὐ is the negative of fact and statement, and contradicts or denies;
- μή is the negative of the will and thought, and rejects or deprecates. Smyth §2688
- Used together, ου μη are the strongest possible way to negate something in the Greek language; cf GGBB 468.
- For ουδεις, see Smyth §2736.
A double negative strengthens the negation.