The quality or state of being capable of causing something; the ability to produce an effect.
From 'causable' (capable of being caused or of causing) plus the suffix '-ity', which converts adjectives into nouns expressing the quality itself. Rooted ultimately in Latin 'causa'.
This is a philosophical word: 'causability' is what lets us talk about the very concept of cause and effect—without a word like this, we'd struggle to discuss whether something has the power to make other things happen.
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