dependency
nounUK /dɪˈpendənsi/
US /dɪˈpendənsi/
When you need someone or something to help you.
A baby's dependency on its parents is natural.
SYNONYMS
OTHER MEANINGS
2. A place or group that is controlled by another country.
The island was once a dependency of the mainland.
3. The state of being addicted to something, like a drug.
He sought help for his dependency on painkillers.
4. In computing, a part of a program that another part needs to work.
The software failed to install because of a missing dependency.