bedrock
n.
also bed-rock, 1850, from bed, n. + rock, n.. Figurative use by 1869; as an adjective by 1881.
| 词汇 | bedrock |
| 词根词缀 | Online Etymology Dictionary bedrock n. also bed-rock, 1850, from bed, n. + rock, n.. Figurative use by 1869; as an adjective by 1881. |
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