not ever; at no time in the past or future; "I have never been to China"; "I shall never forget this day"; "had never seen a circus"; "never on Sunday"; "I will never marry you!"
not at all; certainly not; not in any circumstances; "never fear"; "bringing up children is never easy"; "that will never do"; "what is morally wrong can never be politically right"
to some (great or small) extent; "it was rather cold"; "the party was rather nice"; "the knife is rather dull"; "I rather regret that I cannot attend"; "He's rather good at playing the cello"; "he is kind of shy"
on the contrary; "rather than disappoint the children, he did two quick tricks before he left"; "he didn't call; rather (or instead), he wrote her a letter"; "used English terms instead of Latin ones"