Able to be negotiated or haggled over in terms of price or terms.
From 'bargain' (from Old French 'bargaine,' possibly from Germanic roots) plus '-able' (from Latin 'habilis' meaning 'easily handled'). The suffix '-able' means 'capable of being.'
The 'able' suffix is so productive in English that we can attach it to almost any verb—'bargain,' 'negotiate,' 'discuss'—to create new adjectives, which is why English feels like it's constantly creating new words from old parts.
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