This is the 981st most frequent Polish word.
tymi
The word "tymi" is the instrumental plural form of "ten" in Polish, meaning "these" or "those" when used with instruments or means.
In this sentence, "tymi" serves as an instrumental case plural form of "te" (these), which identifies the specific group of people in the context of the sentence.
Chcę porozmawiać z tymi osobami.
I want to talk with these people.
Here, "tymi" again is in the instrumental case plural form of "te" (these), agreeing with its associated noun (tools) as per its action in the sentence.
Pomagamy tymi narzędziami w warsztacie.
We are helping with these tools in the workshop.
The word "tymi" is used here as an instrumental case plural form of "te" (these), corresponding to the noun's grammatical context (books being the subject of interest).