Peak
Mountain
noun, suffix
The peak of the mountain is a peak or mountain.
Since this word is made up of a single kanji, it probably uses the kun'yomi reading. You did not learn this reading, so here's a mnemonic to help you:
When you climb to the top of the peak, you're so amazed to find vegetation at this altitude. The only thing that grows here, and in thick amounts, is 竹 (たけ). It is impeding your progress to the very top of the peak, in fact, which is a bother. It's as if it's guarding something...
富山県には、剣の山という意味の、剣岳と呼ばれる山があります。
There is a mountain called Tsurugidake, which literally means Mt. Sword, in Toyama prefecture.