1.
basis, grounds, foundation
The reason or evidence upon which a belief, claim, or action is based.
Related Words
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証拠 (evidence, proof (concrete))
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理由 (reason)
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所以 (reason, grounds, basis)
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拠り所 (basis, foundation, support)
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裏打ち (lining)
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依拠 (reliance)
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典拠 (authority)