
die Klippe
cliff
A steep, high rock that rises out of the sea or along a coast.
Wir standen oben auf der Klippe und blickten auf das tosende Meer.
We stood at the top of the cliff and looked out at the roaring sea.
cliff
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cliff
A steep, high rock that rises out of the sea or along a coast.
Wir standen oben auf der Klippe und blickten auf das tosende Meer.
We stood at the top of the cliff and looked out at the roaring sea.

obstacle
In a figurative sense, a difficult situation, obstacle, or danger that must be overcome.
Mit der mündlichen Prüfung hatte er die letzte Klippe des Studiums umschifft.
With the oral exam, he had navigated around the last obstacle of his studies.
You can recognize the figurative meaning by the fact that it is not about geography. When exams, negotiations, or projects are being discussed, 'Klippe' (cliff/obstacle) is a metaphor for a difficulty.
Die Gehaltsverhandlung war die letzte große Klippe vor der Vertragsunterzeichnung.
The salary negotiation was the last major obstacle before the contract was signed.
In the literal meaning, 'Klippe' (cliff) is often described with adjectives such as 'steil' (steep), 'hoch' (high), or 'schroff' (rugged). Typical verbs are 'stehen' (to stand), 'blicken' (to look), or 'klettern' (to climb).
Vorsichtig trat er an den Rand der steilen Klippe.
Carefully, he stepped to the edge of the steep cliff.
In the figurative sense, 'Klippe' (obstacle) is often used with the verb 'umschiffen' (to navigate around). 'Eine Klippe umschiffen' means to skillfully avoid or master a difficulty.
Dank guter Vorbereitung konnte er die schwierigsten Fragen im Interview umschiffen.
Thanks to good preparation, he was able to navigate around the most difficult questions in the interview.
hurdle
Hürde and Klippe can both refer to a difficult situation or an obstacle. Hürde is more likely to describe a task that you actively overcome, while Klippe emphasizes a danger or difficult point that you should avoid if possible. Choose Hürde for the challenge and Klippe for the danger to be avoided.

Die unklaren Regeln sind eine Klippe, die wir bei der Planung möglichst umschiffen müssen.
The unclear rules are a hazard we need to avoid as much as possible when planning.
Die zusätzliche Prüfung ist eine Hürde, die wir mit guter Vorbereitung überwinden können.
The additional exam is a hurdle that we can overcome with good preparation.