This is the 788th most frequent Spanish word.
ti
"Ti" is the singular, informal object pronoun in Spanish meaning "you" (used after prepositions).
In this sentence, 'ti' is the object of the preposition. It is used as the prepositional pronoun complement accompanying 'con'.
Quiero hablar contigo.
I want to talk with you.
Here, 'ti' is again used after the preposition 'para' to indicate the recipient.
Esto es para ti.
This is for you.
In this context, 'ti' follows the preposition 'de' to specify the origin.