I always make sure to have first aid kits in my car and at home.

I always keep a first aid kit in my car in case of emergencies.

I always carry a first aid kit in my car.

This is my first-party purchase.

I have first hand experience of the situation.

Ladies first.

Newton's first law states that an object at rest tends to stay at rest and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

The farmers brought their firstfruits to the market.

The first fruits of the harvest were ripe and ready to be picked.

The firstfruit of the harvest was offered as a thanksgiving offering.