Synonyms: important, serious, grave, significant, weighty, fateful, consequential
Tomatillos are a key ingredient in fresh and cooked Mexican and Central‐American green sauces.
Never in the war had al‐ʾAssad’s forces lost control of so many key cities in such a short space of time.
Russia is reenforcing embattled military units in Charkiv as it scrambles to counter a Ukrainian advance that has taken Kyiv’s troops to the edge of two key cities in the region.
Years of mismanagement and systematic corruption are believed to be a key reason why the state utility has been unable to keep the lights on