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Congruous (adjective)
Corresponding in character.
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Congruous (adjective)
Harmonious.
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Incongruous (adjective)
Not similar or congruent; not matching or fitting in.
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Incongruous (adjective)
Of two numbers, with respect to a third, such that their difference can not be divided by it without a remainder.
“20 and 25 are incongruous with respect to 4.”
Wiktionary
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