Capable of being chosen or able to be selected from multiple options.
From 'choose' (Old English 'ceosan') plus the suffix '-able,' which comes from Latin and means 'capable of being.'
The '-able' suffix is so powerful in English that you can attach it to almost any verb to create an adjective—'readable,' 'doable,' 'choosable'—which is why English speakers can understand brand-new words they've never heard before!
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