to lean against; to recline on something for support (physically).
疲れて電柱に寄りかかって休んだ。
I was tired and leaned against a utility pole to rest.
ソファに寄りかかってテレビを見ていた。
He was leaning back on the sofa watching TV.
子どもが母親に寄りかかって眠っている。
The child fell asleep leaning on his mother.
to rely on; to depend on someone or something (emotionally, financially, etc.).
彼はいつまでも親の収入に寄りかかっているわけにはいかない。
He can't keep depending on his parents' income forever.
習慣に寄りかかって新しい方法を試さないのはよくない。
Relying on habit and never trying new methods isn't good.
単なる先例に寄りかかるだけでは創造性は生まれない。
If you simply lean on precedent, creativity won't arise.