The Dutch word for cave is
grot

Dutch Definition

cave
1. grot, hol

hol
1. n-n. A hole, hollow, cavity
2. n-n. (nautical) A cargo hold
3. n-n. (vulgar) An anus, arsehole; both anatomical senses of butt
Je hol zul je zelf moeten schoonmaken. - You'll have to clean up your arse yourself.
4. n-n. (by extension) Any other bodily cavity that resembles a hole
5. n-n. An artificial opening such as a slit
6. n-n. burrow (a hole or tunnel dug by a small animal, like a rabbit, used as a dwelling)
7. n-n. (figuratively) An unsanitary and/or unpleasant place; shithole
8. adj. hollow, having an empty space inside
9. n-m. A run, the action running
10. n-f. A small height in the landscape, such as
11. n-f. a hill (like the Utrecht city wall ruins)
12. n-f. a sloping road (as in Rotterdam)
13. v. first-person singular present indicative of hollen
14. v. imperative of hollen

grot	©
1. n-f. cave, cavern
Twaalf mensen waren omgekomen, nadat ze in een grot verdwaald geraakt waren. - Twelve people had passed away, after they had got lost inside a cave.