This is the 411th most frequent Chinese word.
坐
"Sit" or "to sit."
Here, '坐' is used as a verb meaning 'to sit', indicating the action of being seated.
我坐在椅子上。
I sit on the chair.
Here, '坐' is again used as a verb meaning 'to sit', describing a habitual action or position.
他喜欢坐在窗前看书。
He likes to sit in front of the window and read.
In this sentence, '坐' conveys traveling by a means of transportation, literally 'to sit in a plane'.