This is the 11228th most frequent Korean word.
기체로
"기체로" means "in a gaseous state" or "as a gas."
Here, '기체로' is used to indicate that the balloon is filled with gas.
기체로 가득 찬 풍선이 천장 위로 떠올랐다.
The balloon filled with gas rose to the ceiling.
Here, '기체로' is used to describe the initial state of steam as being gaseous.
기체로 증기가 초기에 형성된다.
Steam initially forms as a gas.
In this sentence, '기체로' signifies the state to which the substance transforms.