Able to be beaten, defeated, or overcome; vulnerable to being beaten or winning against.
From 'beat' (Old English 'beatan' meaning 'to strike') plus '-able' (from Latin '-abilis' indicating capability or possibility), creating an adjective meaning 'capable of being beaten.'
The '-able' suffix is one of English's most powerful—it attaches to almost any verb to create endless possibilities ('fixable,' 'lovable,' 'sustainable'), which is why new '-able' words sound natural even if we've never heard them before.
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