Bèi yuānwang le què bùnéng shēnbiàn, zhēnshì biēqì.
Being wronged but unable to defend yourself is truly suffocating.
Tips
usage
憋气 has two senses: (1) literal, to hold one's breath physically; (2) figurative, to feel frustrated or stifled, unable to express oneself. Context makes the meaning clear.