"I want a strawberry today."
Translation:Teastaíonn sú talún uaim inniu.
It doesn't have any independent meaning in this sentence - it only modifies the meaning of the verb in the sentence.
uaim is a prepositional pronoun, a combined form of the preposition ó and the first person singular pronoun mé.
While the basic meaning of ó is usually "from", the specific meaning in different contexts can be different, in much the same way that "up" isn't an indication of position or direction in a phrase like "shut up" or "break up".
In a construction like tá X uaim, the verb is tá and tá X uaim means "X is wanted by me".
In a phrase like tá X i bhfad uaim, you get "X is far away from me" (or just "X is in the distance")