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wane

/weɪn//weɪn/·verb
to decrease gradually in size, strength, or intensity
Fig. 1 — Night after night I watch the moon give a little more of its light back to the dark — full, then gibbous, then half, then a thin crescent, then gone.
01Definition

To wane is to shrink the way the moon does — by nightly degrees, on a schedule older than the word itself, which comes from Old English wanian, 'to lessen'. Enthusiasm wanes, influence wanes, daylight wanes toward winter. Two graces distinguish it from mere decline: waning is gradual, and it is often part of a cycle — what wanes may wax again. The set phrase 'wax and wane' keeps the whole moon inside the language.

02In use
  • iPublic enthusiasm for the project began to wane as the costs continued to accumulate.
  • iiBy late autumn the daylight wanes noticeably before five o'clock.
  • iiiThe empire's influence waxed and waned over four centuries.
03Collocations
  • wax and wane
  • on the wane
  • interest waned
  • enthusiasm wanes

Family waning (adjective)

04Relations

=decline, diminish, fade, ebb, dwindle

≠wax, grow, surge

05Compared
PairThe difference
wane vs dwindlea countable amount draining toward nothing, one way → dwindle; a strength or intensity fading, able to return → wane.
wane vs surgerushes up all at once → surge; fades away by degrees → wane.
06TOEFL & IELTS

A precision verb for IELTS Writing Task 1 downward trends ('interest waned steadily') and a TOEFL reading regular in history and astronomy passages. Learn it as half of the pair 'wax and wane' — describing anything that strengthens and weakens cyclically earns immediate credit. Close cousin: 'on the wane' (in decline).

07Asked
What does wane mean?
To decrease gradually in size, strength, or intensity — the way the moon shrinks by nightly degrees. Enthusiasm wanes, influence wanes, daylight wanes toward winter. Two things set it apart from plain decline: waning is gradual, and it is often part of a cycle, so what wanes may return. The scene above holds that promise — the moon gives its light back to the dark, and because it must, it comes back.
What is the difference between waxing and waning?
They are opposite halves of a cycle. To wax is to grow — the moon waxing from crescent to full; to wane is to shrink — full back down to nothing. The memory hook: a waxing moon is filling out, a waning moon is fading away. Beyond the moon, anything that grows and shrinks in turn 'waxes and wanes' — fortunes, empires, enthusiasm.
What does 'on the wane' mean?
In decline — fading, past its peak. 'Support for the plan is on the wane' means it is steadily weakening. The phrase freezes the verb into a state you can point at: something has entered its shrinking phase. It carries the word's gentler note — a gradual ebbing rather than a sudden collapse — and often a hint that the fall could reverse, since what wanes may wax again.
Is 'wane' a verb or a noun?
Mainly a verb — enthusiasm wanes, the moon wanes. It survives as a noun almost only in the fixed phrase 'on the wane', meaning in decline. So in practice you use the verb freely ('interest waned over the summer') but reach for the noun just in that one idiom. Watch the spelling too: wane (to decline) is not wain (a farm wagon) or wan (pale).
Is wane the opposite of surge?
Yes — a slow fade against a sudden swell, and the two are set head to head on the surge vs wane page in the 'Compared' list above.