"Eu îi dau o prăjitură bunicii."

Translation: I give a cake to the grandmother.

[MLSavage]

Is there a reason why "I give a cupcake to grandmother (grandma)," without the definite article THE is not accepted?

[Alex502643]

Why not: I give grandmother a cake?

[ejfubb43o]

Late to this but that implies that the grandmother is yours, and not just a grandmother.
If I were to say
"I give mother a cookie"
I'm implying that it is my mother, but if I say "I give THE mother a cookie", I'm saying it could be any mother, not mine.
The sentence doesn't imply the grandmother is yours.
Hope this helps and I'm sorry if I'm incorrect.

[ANfg91]

Is anyone able to explain how we know that it is grandmother rather than grandfather and direct me to the section to look at again? Thank you

[Einer273137]

to the grandfather would be 'bunicului'