v.减少，下降；v.结束；v.（月亮的）亏
Merriam-Webster Online Dictionary
wane (verb)intransitive verb
1.
to decrease in size, extent, or degree as - dwindle
a) to diminish in phase or intensity - used chiefly of the moon, other satellites, and inferior planets
b) to become less brilliant or powerful - dim
c) to flow out - ebb
2.
to fall gradually from power, prosperity, or influence abate
1.
a) the act or process of waning - strength on the wane
b) a period or time of waning , specifically the period from the full moon to the new moon
2.
Middle English, defect, from Old English akin to Old English deficient a defect in lumber characterized by bark or a lack of wood at a corner or edge
Merriam-Webster Online Thesaurus
wane (verb)to grow less in scope or intensity especially gradually
SYNONYMS:
abate, decline, de-escalate, die (away down out), diminish, drain (away), drop (off), dwindle, ease, ebb, fall, fall away, lessen, let up, lower, moderate, pall, phase down, ratchet (down) rachet (down), recede, relent, remit, shrink, subside, taper, taper off, waneRELATED WORDS:
compress, condense, constrict, contract; evaporate, fade (away), fritter (away), give out, melt (away), peter (out), tail (off), vanish; slacken, slow (down); alleviate, relax; flag, sink, weaken; cave (in), collapse, deflateNEAR ANTONYMS:
appear, emerge, show up; blow up, distend, elongate, lengthen