verb
rely
rih-LY/rɪˈlaɪ/
To depend on someone or something for help or support.
The climber relies on the partner's firmly held rope for support.

Etymology
The underlying image is binding fast, with re- perhaps strengthening “bind.” Dependence with trust may have developed through the idea of rallying to others or falling back on them.
In context
More than 300 employees work for us, and more than 10,000 market vendors rely on us for their daily supplies.
Today, we rely on maps less and less for navigation,
More examples
- This town relies on tourism for much of its income.
- We relied on a map to find the cabin.
- You can rely on me to keep your secret.
Forms
rely · relies · relied · relying
reliance noun — Dependence on someone or something for support.
reliable adjective — Able to be trusted or depended on.