The cavern was filled with stalactites & stalagmites.
From Wikipedia:
"A stalagmite is a type of speleothem that rises from the floor of a limestone cave due to the dripping of mineralized solutions and the deposition of calcium carbonate. This stalagmite formation occurs only under certain pH conditions within the underground cavern. The corresponding formation on the ceiling of a cave is known as a stalactite. If these formations grow together, the result is known as a column."
It can be seen that the stalactite has united with the stalagmite below
The stalactite looked like an icicle as it hung from the ceiling of the cave.
A Stalagmite forms on a cave floor from the dripping of Mineral Rich water.
use it by saying- how can you use the word ebullient in a sentence?
Can you use the word concluding in a sentence? Done.
How can you use the word infectious in a sentence
You can use the word Truss in a sentence like this.
Just use it! Or do you mean, can you use the word beheld in a sentence.
Since that is not a word I would not attempt to use it in a sentence.
You just did use the word colonize in a sentence.
You can use the word Terrorist in a sentence as " Muslims are not terrorist ".
How do you use the word decibel in a sentence?What is decibel used for?