constant

adjective
UK /ˈkɒn.stənt/
US /ˈkɑːn.stənt/

Something that stays the same and never stops.

The baby's crying was constant, so we took her for a walk.


OTHER MEANINGS

2. Happening all the time without a break.

She lives in constant fear of spiders.

3. Staying the same over a long time.

The temperature in the cave stays constant all year.

4. A number or value that does not change in math or science.

In the equation, five is a constant.

5. Loyal and faithful to someone.

He was a constant friend through hard times.