wane

Things that wax and wane grow larger and smaller, like the moon. Things that wane simply grow smaller. "My initial enthusiasm for helping waned when I saw the pile of envelopes that needed licking."

You may have heard the expression "on the wane." It means a fad, or a fashion, or a disease, that is on its way out the door. "The face mask fad at school was on the wane as new reports of kids infected with a dreaded new fly virus waned."

Definitions of wane
1

n a gradual decline (in size or strength or power or number)

Synonyms:
ebb, ebbing
Type of:
decline, diminution
change toward something smaller or lower

v grow smaller

“Interest in the project waned
Synonyms:
decline, go down
Types:
show 5 types...
hide 5 types...
dip
go down momentarily
wear on
pass slowly (of time)
drop
go down in value
fall off, sink, slump
fall heavily or suddenly; decline markedly
tumble
fall suddenly and sharply
Type of:
decrease, diminish, fall, lessen
decrease in size, extent, or range

v become smaller

“Interest in his novels waned
Antonyms:
climb, mount, rise, wax
go up or advance
Type of:
decrease, diminish, fall, lessen
decrease in size, extent, or range

v decrease in phase

“the moon is waning
Antonyms:
full, wax
increase in phase
Type of:
decrease, diminish, fall, lessen
decrease in size, extent, or range

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