callous

她对他失去工作的困境表现得如此冷漠。

Her ___callous reaction to his job loss was shocking.

那位资深护士对绝症患者病情的冷漠言论激怒了前来探视的家属。

The senior nurse's ___callous remarks about the terminal patient's condition enraged the visiting relatives.

那家工厂冷酷无情地将化工废料排入河中，污染了下游村庄的水源。

The factory's ___callous dumping of chemical waste into the river poisoned the downstream village's water supply.