Having a pallor (pale face) due to fear or similar emotion(adjective)
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Use "ashen-faced" in a sentence
"They turned to find Annabel standing there, ashen-faced, acute shame showing in every line of those beautiful features."
"His door opened with a force he remembered from the former departmental oversight, and an ashen-faced agent breathing heavily practically fell into the office."
"He rushed through the formalities of the event and arrived shortly afterwards on the South Bank ashen-faced, muttering: "I came as soon as I could.""