Singular
NOMINATIVE
costas díreach
▪an costas díreach
GENITIVE
costais dhírigh
▪an chostais dhírigh
NOTE When the definite article
(an)
is not present, generally the nominative is used instead of the genitive:
ag lorg an chostais dhírigh, le haghaidh an chostais dhírigh
but ag lorg costas díreach, le haghaidh costas díreach.
Plural
NOMINATIVE
costais dhíreacha
▪na costais dhíreacha
GENITIVE
costas díreach
▪na gcostas díreach
NOTE When the definite article (na) is not present, generally the nominative is used instead of the genitive:
ag lorg na gcostas díreach, le haghaidh na gcostas díreach
but ag lorg costais dhíreacha, le haghaidh costais dhíreacha.