This is the 427th most frequent Hungarian word.
tartó
Holder or support.
Here, "tartó" refers to a structural support or holder for the shelf.
A polc tartója nagyon erős.
The shelf holder is very strong.
In this case, "tartó" is used as an adjective to imply durability or continuation.
Ez az anyag sokáig tartó hatást biztosít.
This material ensures a long-lasting effect.
Here, "tartó" is used in its active participle form, referring to the person who is holding something.