Simple past tense and past participle of border.(verb)
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Use "bordered" in a sentence
"He looked so offended and emotionally wounded, his expression bordered on angry."
"The blank side of his face was much wrinkled and puckered up, which gave him a very sinister appearance, especially when he smiled, at which times his expression bordered closely on the villainous."
"We sheltered behind the great beams supporting the windmill, and looked out through them, north and east, over a wide landscape; a plain bordered eastward by low hills, every mile of it, almost, watered by"