Capable of causing displeasure; unpleasant or disagreeable.
From displeasure plus the suffix -able (meaning 'capable of'). This is a rare formation where -able is added to a noun rather than a verb.
Words like 'displeasurable' show English's experimental side—speakers can technically make almost any word 'doable' with '-able,' but not all combinations survive in actual use, which means some creative formations are one-time events!
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