Translation of "in vain" into Indonesian

Well, I just wanted to reassure you that not all of your cultural indoctrination was in vain.

Aku hanya mau memastikan padamu bahwa tidak semua pengajaran budayamu sia-sia.

That without me, you'd still be staring at four gray walls, Waiting in vain for your freedom.

Tanpaku, kau mungkin masih menatap dinding ruangan itu menghabiskan waktu percuma menunggu pembebasanmu.

Furthermore, their writings have been attacked from all quarters, but in vain.

Selain itu, tulisan mereka telah diserang dari segala penjuru, namun tanpa hasil.