Adamant

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(FIGURATIVE) ក្បាលរឹង, រឹងរូស, ដែលចចេស
Example: She was quite adamant that she would not come.

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(Very hard, unyielding) ដែលចចេស, ដែលរឹងរូស, ដែលមិនអាចបត់ឬពត់បាន, ដែលស្ពឹក, ដែលមិនដឹងឈឺចាប់ក្ដៅត្រជាក់
Example: Once Dara had made his decision, he was adamant arid would not change his mind.

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A stone imagined by some to be of impenetrable hardness; a name given to the diamond and other substances of extreme hardness; but in modern mineralogy it has no technical signification. It is now a rhetorical or poetical name for the embodiment of impenetrable hardness.

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firm, hard, immovable, insistent, positive, unyielding

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Lodestone, magnet