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2Signification: defendsubstantiate justify maintain supportuphold corroborate assert vindicate
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3Signification: maintainconfirm corroborate warrant contendassert claim argue justify
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4Signification: proveauthenticate confirm validate ratifyverify corroborate attest substantiate
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5Signification: activityverify ascertain corroborate confirm certifydemonstrate affirm determine prove
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6Signification: substantiateback up bolster confirm authenticatecorroborate validate verify strengthen
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7Signification: verifyconfirm corroborate ratify authenticateendorse accredit certify