wax and wane

1. Increase and decrease, as in size, number, strength, or intensity, as in Enrollments in these programs wax and wane from year to year. This expression alludes to the phases of the moon, with its periodic changes in size. It was first recorded in the 1300s.

Example Sentences

Winds could wax and wane throughout the alert period, forecasters caution.

From Los Angeles Times

Their power doesn’t wax and wane depending on their clothing.

From Salon

Babies do not arrive on anyone’s schedule, and the busyness of labor and delivery units can wax and wane accordingly.

From Los Angeles Times

Harris, a former San Francisco district attorney, state attorney general and U.S. senator, has seen her popularity wax and wane.

From Los Angeles Times

The Moon is our constant companion, as we watch it wax and wane through its various phases as it glows bright in the sky.

From BBC