Consequential (adjective)

1. Having important consequences or results.
2. Having a significant effect on a situation or outcome.

Origin:

The word 'consequential' comes from the latin word 'consequi' which means 'to follow.'.

Examples:

1. The decision to go to war had consequential effects on the country and its people.
2. The judge ruled that the error was consequential and required a new trial.
3. The global financial crisis had far-reaching and consequential effects on the world economy.
4. The study showed that air pollution has consequential health effects on people living in cities.
5. The failure of the dam had consequential consequences for the nearby towns and villages.