Singular
NOMINATIVE
dubh gorm
▪an dubh gorm
GENITIVE
duibh ghoirm
▪an duibh ghoirm
NOTE When the definite article
(an)
is not present, generally the nominative is used instead of the genitive:
ag lorg an duibh ghoirm, le haghaidh an duibh ghoirm
but ag lorg dubh gorm, le haghaidh dubh gorm.