agonizing
adjective (UK usually agonising) uk/ˈæɡ.ə.naɪ.zɪŋ/ us/ˈæɡ.ə.naɪ.zɪŋ/
使人十分痛苦的;折磨人的
causing extreme physical or mental pain
an agonizing death 痛苦的死亡
令人焦虑不安的
causing extreme worry
She went through an agonizing few weeks waiting for the test results. 检查结果出来前的几个星期里，她每天都提心吊胆，度日如年。
We are faced with an agonizing choice/decision/dilemma. 我们面临痛苦的选择／抉择／两难困境。