Ionnsaich← Home
rathadroadmasculine noun
the
an rathad
after a preposition
an rathad
of the
an rathaid
plural
rathaidean
the (plural)
na rathaidean

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.