depend on
恃 centers on relying on someone or something for support: depending on another person or leaning on them emotionally or practically.
恃 combines the heart radical 忄 with 寺, which likely contributes the sound. The heart radical suggests an emotional or mental reliance.
The heart radical 忄 beside 寺 suggests a heart leaning on a temple for support. Picture someone depending on a temple as a place of refuge.
For ジ, imagine depending on a Gee-tar-playing friend at the temple: Gee -> ジ, and your heart relies on their music.