This is the 719th most frequent German word.
dich
"You" (informal, accusative case).
Here, 'dich' is the accusative form of 'du' and acts as the direct object of the verb 'lieben' ('to love').
Ich liebe dich.
I love you.
In this sentence, 'dich' is the accusative form of 'du' and is part of the prepositional phrase 'auf dich', where 'auf' governs its form.
Kann ich mich auf dich verlassen?
Can I rely on you?
The word 'dich' functions as the direct object and follows the verb 'sehen' ('to see') in the accusative case.