For direction:
* पीछे (pichhe): This is the most common word for "backward" in terms of direction.
* उल्टा (ulta): This means "opposite" or "reversed" and can also be used to indicate backward movement.
For development or progress:
* पिछड़ा हुआ (pichhada hua): This means "backward" in terms of development or progress, often referring to economically or socially disadvantaged communities.
* मंद (mand): This means "slow" or "weak" and can be used to describe something that is lagging behind in development.
* अविकसित (avikast): This means "undeveloped" and is used to describe a region or society that is lagging behind in terms of progress.
Other meanings:
* वापस (vapas): This means "back" or "return" and can also be used to indicate backward movement.
* पश्चगामी (pashchagami): This is a more formal word for "backward" and is used to describe something that is regressive or outdated.
The best Hindi word to use will depend on the specific context and meaning you want to convey.