verschleiern
to conceal
To deliberately hide, obscure, or disguise true intentions, facts, or the truth.
Das Unternehmen versuchte, die schlechten Geschäftszahlen zu verschleiern.
The company tried to conceal the poor business figures.

to conceal / veil
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to conceal
To deliberately hide, obscure, or disguise true intentions, facts, or the truth.
Das Unternehmen versuchte, die schlechten Geschäftszahlen zu verschleiern.
The company tried to conceal the poor business figures.

The verb is derived from the noun 'der Schleier' (the veil). The literal meaning is to cover something with a veil. The figurative meaning 'etwas verbergen' (to hide something) is derived from this.
Sie verschleierte ihr Gesicht mit einem Tuch.
She veiled her face with a cloth.
'Verschleiern' (to conceal / veil) is an inseparable verb. The prefix 'ver-' always stays attached to the stem and is not placed at the end of the sentence.
Er verschleierte seine wahren Gefühle hinter einem Lächeln.
He concealed his true feelings behind a smile.
You can recognize the figurative meaning by the fact that the object is something abstract. For example, you can conceal the truth, facts, intentions, or problems.
Der Politiker versuchte, seine Beteiligung an dem Skandal zu verschleiern.
The politician tried to conceal his involvement in the scandal.
to clarify
'klären' and 'verschleiern' are opposites when it comes to facts, problems, or the truth. 'klären' means making something understandable and resolving an open question. 'verschleiern' means deliberately making something unclear or hiding the truth. So 'klären' helps create clarity. 'verschleiern' prevents exactly that clarity.

Der Bericht verschleiert, wer für den Fehler verantwortlich war.
The report conceals who was responsible for the mistake.
Im Gespräch klären wir, warum die Rechnung so hoch ist.
In the conversation, we clarify why the bill is so high.