Definition of "couldst" [couldst]

• Second-person singular simple past form of can. (verb)
• Alternative spelling of couldest. (verb)

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• "Thy strong features glowing with compassion for me; thy lips twisted; thy forehead furrowed; thy whole face drawn out from the stupid round into the ghastly oval; every muscle contributing its power to complete the aspect grievous; and not one word couldst thou utter, but Amen! to my vow."
• "Thou with one word couldst clear thyself, and hast"
• ""How couldst thou keep track o 'that?" he asked, be - mused."