IPA: /ˌjunɪˈvɛntfəli/
KK: /jun'evəntfəlē/
In a way that is calm and without any exciting or unusual events.
The journey went uneventfully, with no delays or problems.
Uneventfully → It is formed from "un-" (meaning not) and "eventful" (from the root "event" which comes from Latin "eventus", meaning outcome or occurrence, and the suffix "-ful" meaning full of). The word "uneventfully" means not full of events or occurrences, indicating a lack of significant happenings.
Think of 'not' ('un-') being added to 'full of events' ('eventful') — that's why uneventfully means a time without significant happenings.