Covered with ash or reduced to ash; having the appearance or consistency of ash.
From ash (the powdery residue of fire, from Old English 'æsce') plus the past tense/adjective suffix -ed.
The word 'ashed' perfectly captures the post-fire landscape—archaeologists use ash layers to date ancient sites, so this simple adjective represents millions of years of Earth's history compressed into volcanic and fire-driven soil.
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