IPA: /ʌnˈkʌmfərtəbli/
KK: /ʌnˈkʌmfərtəbli/
In a way that causes discomfort or unease.
She shifted uncomfortably in her seat during the long meeting.
Uncomfortably → It is formed from "un-" (meaning not) and "comfortable" (from Latin "comfortare", meaning to strengthen or soothe) and the suffix "-ly" (meaning in a manner). The word "uncomfortably" means in a manner that is not comfortable or causing discomfort.
Think of 'not' ('un-') being added to 'comfortable' — this helps you remember that 'uncomfortably' means in a way that is not comfortable.