Simple past tense and past participle of dado. (verb)
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Use "dadoed" in a sentence
"The only traces he could find of his previous life here were a few of the paperbacks now ensconced on nicely dadoed pine shelves between the kitchen and living area, mixed in with a bunch of beachy page-turners: Elmore Leonard, Michael Crichton, Kurt Vonnegut."
"For Dolly, growing anxious about his meaning, yet ready to think about another proposal, was desirous to sit down on the sweet ledge of grass, yet uneasy about her pale blue sarsenet, and uncertain that she had not seen something of a little sea-snail (living in a yellow house, dadoed with red), whom to crush would be a cruel act to her dainty fabric."
"The room itself, elegantly coved and dadoed, was a sophisticated mix of purples and contrasting shades, mainly ochres and whites, against which the King made a different kind of contrast, dressed today not in his Roman wear but local garments in a whole fruit basket of berry dyes."