implacable

尽管他多次尝试和解，对方的态度依然不可动摇。

Despite his repeated attempts at reconciliation, their attitude remained ___implacable.

被告面对着一个不为所动的陪审团，他们的表情没有流露丝毫同情。

The defendant faced an ___implacable jury whose expressions betrayed no hint of sympathy.

她以不可动摇的专注追求目标，拒绝了一切出现在面前的干扰。

She pursued her goal with ___implacable focus, turning down every distraction that came her way.