Capable of being caused; able to cause something or to be caused by something.
From 'cause' plus the suffix '-able', meaning 'capable of' or 'worthy of'. The construction follows standard English patterns for creating adjectives from verbs.
The suffix '-able' is everywhere in English, but 'causable' reminds us that this ending originally meant 'worthy of' or 'capable of'—it's a leftover from the days when English borrowed this pattern from French and Latin legal language.
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