certainly
🇺🇸
/ˈsɜːrtnli/
🇬🇧
/ˈsɜːtnli/
without any doubt
She will certainly arrive on time because she is always punctual.
她肯定会准时到达,因为她总是很守时。
yes, of course
"Can you help me?" "Certainly, I would be happy to assist you."
"你能帮我吗?" "当然,我很乐意协助你。"