This is the 530th most frequent Turkish word.
halde
"In the state of," "while," or "though," depending on the context.
Here, 'halde' means 'in a state of' or 'while being in the condition of'.
Bu kadar yorgun halde işe gitmek zorunda kaldım.
I had to go to work in such an exhausted state.
In this case, 'olduğu halde' equates to 'even though' or 'despite'.
Hava güzel olduğu halde dışarı çıkmadık.
Even though the weather was nice, we did not go outside.
Here, 'halde' is used to describe an ongoing state or condition.