Singular
NOMINATIVE
oighear dubh
▪an t-oighear dubh
GENITIVE
oighir dhuibh
▪an oighir dhuibh
NOTE When the definite article
(an)
is not present, generally the nominative is used instead of the genitive:
ag lorg an oighir dhuibh, le haghaidh an oighir dhuibh
but ag lorg oighear dubh, le haghaidh oighear dubh.