IPA: /rɪˈmɑːrkəblɪ/
KK: /rɪˈmɑrkəblɪ/
In a way that is unusual or worthy of attention.
She performed remarkably well in the competition.
Remarkably → It is formed from "re-" (meaning again) and "marcare" (from Latin, meaning to mark) and the suffix "-ably" (meaning in a manner that). The word "remarkably" means in a manner that marks something again, or in a way that is worthy of notice.
Think of something being 'marked' ('marcare') again ('re-') — that's why remarkably means something is done in a way that stands out.