intransitive. To become hollow or concave.
| 单词 | θ99614 |
| 释义 | the world > space > shape > unevenness > condition or fact of receding > hollowness > become hollow [verb (intransitive)] (4) hollow1862 intransitive. To become hollow or concave. Subcategories:— become full of cavities (1) — burrow under surface (2) |
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