The weather can have an effect on your mood.

The new law will come into effect next month.

The stage effect was stunning, with vibrant lights and smoke filling the air.

The decision had a ripple effect throughout the company, causing changes in various departments.

The medication may have some side effects.

I packed all my personal effects for the trip.

The new environmental regulations created a knock-on effect throughout the entire industry.

The government's innovative subsidy program resulted in a spillover effect that boosted local small businesses.

The Dunning-Kruger effect refers to the cognitive bias where people with low ability at a task overestimate their ability.