adjective
possibly, potentially
B1
eventuell means possibly or potentially (not 'eventually'). It expresses uncertainty or contingency: e.g., 'Das bringt eventuell Probleme.' Not gradable; functions adverbially. Often interchangeable with vielleicht in informal use. Beware English false friend 'eventually' which means 'in the end' rather than 'possibly'.
Examples
Eventuell komme ich später zum Abendessen.
I might come to dinner later.
Es kann eventuell morgen regnen, also nimm einen Schirm mit.
It could potentially rain tomorrow, so take an umbrella.
Der Direktor sagte, dass eventuell neue Mitarbeiter eingestellt würden, wenn die Auftragslage weiter stiege.
The director said that possibly new employees would be hired if the number of orders continued to increase.
Details
Mnemonics
Imagine a question mark over a calendar date, meaning it might happen.
Sounds like 'even tual' — think 'even if it's possible'.
Notes
Often used like an adverb meaning 'possibly'. Neutral register. Not typically compared (not 'eventueller' in the sense of 'more possible').