enthüllen
to reveal
To make a secret, a truth, or previously unknown information known.
Der Journalist enthüllte einen politischen Skandal.
The journalist revealed a political scandal.

to reveal / unveil
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to reveal
To make a secret, a truth, or previously unknown information known.
Der Journalist enthüllte einen politischen Skandal.
The journalist revealed a political scandal.

'Enthüllen' (to reveal/unveil) is an inseparable verb. It consists of the prefix 'ent-' (away, un-) and the word stem 'hüllen' (to cover). So the literal meaning is 'to remove a covering' or 'to uncover something'.
Die Archäologen enthüllten eine alte Grabkammer.
The archaeologists uncovered an old burial chamber.
The verb 'enthüllen' (to reveal/unveil) always requires an accusative object. This object is the thing that is uncovered or made known.
Die Zeugin enthüllte die Wahrheit vor Gericht.
The witness revealed the truth in court.
The object of the verb indicates the meaning. Abstract objects like 'Geheimnis' (secret), 'Skandal' (scandal), or 'Wahrheit' (truth) mean that information is being disclosed. Concrete objects like 'Denkmal' (monument) or 'Statue' (statue) mean that something is being made physically visible.
Die Zeitung enthüllte die geheimen Pläne der Regierung.
The newspaper revealed the government's secret plans.
When it comes to information, 'enthüllen' (to reveal) is often combined with nouns such as 'ein Geheimnis' (a secret), 'einen Plan' (a plan), 'eine Affäre' (an affair), or 'die wahren Absichten' (the true intentions).
In seinem Buch enthüllt er viele private Details.
In his book, he reveals many private details.
to imagine / introduce
'vorstellen' and 'enthüllen' can both mean that something is shown or made known to the public. 'vorstellen' sounds neutral and fits when you introduce and explain a new product, an idea, or a person. 'enthüllen' is stronger. It fits when something was previously hidden, for example a secret or a truth, or, in a ceremonial scene, a monument under a covering. Learners may confuse the words because both have to do with making something known. If it is only about a normal presentation, 'vorstellen' is more natural. If something was secret, covered, or surprising, 'enthüllen' fits better.

Die Zeitung hat gestern neue Details zu dem Skandal enthüllt.
Yesterday the newspaper revealed new details about the scandal.
Im Teammeeting stellt Frau Becker die neue Idee für das Projekt vor.
In the team meeting, Ms. Becker presents the new idea for the project.