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easbaigbishopmasculine noun
the
an t-easbaig
after a preposition
an easbaig
of the
an easbaig
plural
easbaigean
the (plural)
na h-easbaigean

Also the chess bishop.

Every form but the headword, the genitive and the plural is worked out by the spelling rules in the grammar guide, so what you see here is what the guide teaches. Awaiting a fluent speaker’s review.