also: いえいえ
no; no no; not at all
A strong or emphatic denial, often used to refuse something or correct a misunderstanding. The variant いえいえ is softer and more polite.
"Did you eat already?" "No, no, not yet."
いやいや、そんなことないですよ。
No, no, that's not true at all.
「手伝いましょうか?」「いえいえ、大丈夫です。」
"Shall I help you?" "No, no, I'm fine."