On the left side and on the left–hand side

Air an taobh chlì agus air an làimh chlì

We can say that something or someone is  air an taobh chlì  (on the left side) or  air an làimh chlì  (on the left hand side). But we must remember that some words change in the dative case.

FIREANN | MASCULINE

AINMNEACH | NOMINAL (NOMINATIVE)TABHARTACH | DATIVE
an taobh clìair  an taobh ch
an taobh deasair  an taobh dheas

BOIREANN | FEMININE

AINMNEACH | NOMINAL (NOMINATIVE)TABHARTACH | DATIVE
an làmh chlìair  an làimh chlì
an làmh dheasair  an làimh dheis