IPA: /ədˈmɪtɪdli/
KK: /ədˈmɪtədli/
This word is used to acknowledge or accept that something is true, often in a way that shows you are aware of a negative aspect.
Admittedly, I was not prepared for the exam, but I still managed to pass.
Admittedly is formed from "ad-" (meaning to) and "mittere" (meaning to send) combined with the suffix "-ly" (meaning in a manner). The word means in a manner that sends or conveys acknowledgment, often used to concede a point.
Think of 'sending' acknowledgment ('ad-' means to, and 'mittere' means to send) when you say something is true, which is what 'admittedly' conveys.