Mound
Burial Mound
The kanji and the word are exactly the same. That means they share meanings as well. Usually these types of mounds are burial mounds. (There's bodies under there!)
つか
This has the same reading as the kanji you learned, meaning you know the reading!
塚を見下ろすことのは失礼です。
It’s rude to look down at a burial mound.