why are many substances have hydro in their name??

Question: why are many substances have hydro in their name??
- Keywords:
  chemistry,
  substance
Asked by anon-225803 to Sameed, Jose, joannabarstow, Heidi, Freya, Chris on 16 Nov 2019.
- Heidi answered on 16 Nov 2019:
  
  I’m not a chemistry expert, but from my knowledge, substances are usually called “hydro” if there is one ion attached to Hydrogen. 🙂

Question: why are many substances have hydro in their name??