The public’s indifference to the climate crisis has frustrated environmental activists.
In-diff-er-ence：In（在...里）+ diff（不同）+ erence。对万事万物都无所谓，没有差别感，所以冷漠。
The company does not view the merger as a slam-dunk, citing regulatory hurdles.
Slam（猛击）+ Dunk（浸/扣）：篮球中把球狠狠扣进篮筐，球肯定进，所以是‘十拿九稳的事’。