The quality or degree to which something can be confused with something else or is difficult to understand clearly.
From confuse + -able (capable of being) + -ity (state of). Confuse comes from Latin confundere (con- + fundere, to mix/pour), meaning to mix up; -ity nominalizes the adjective.
Language scientists use confusability studies to understand why certain words or sounds are harder to distinguish—for example, 'b' and 'd' are highly confusable to young children because they're so similar in shape and mouth position.
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