wane

nouns

a gradual decline (in size or strength or power or number)
ebb, ebbing, wane

verbs

grow smaller
"Interest in the project waned"
decline, go down, wane
is derived from
waning
become smaller
"Interest in his novels waned"
wane
is derived from
waning
antonym
wax
is a type of (narrower)
decrease in size, extent, or range
"The amount of homework decreased towards the end of the semester"; "The cabin pressure fell dramatically"; "her weight fell to under a hundred pounds"; "his voice fell to a whisper"
decrease, diminish, fall, lessen
decrease in phase
"the moon is waning"
wane
is derived from
waning
antonym
wax
is a type of (narrower)
decrease in size, extent, or range
"The amount of homework decreased towards the end of the semester"; "The cabin pressure fell dramatically"; "her weight fell to under a hundred pounds"; "his voice fell to a whisper"
decrease, diminish, fall, lessen