For a waning moon:
* Ịgba mkpụrụ: This literally means "to go towards a point" or "to diminish." It captures the idea of the moon getting smaller.
* Ịgba mkpụrụ n'ọnwa: This specifically refers to the moon waning, meaning it is getting smaller after being full.
* Ịgba mkpụrụ n'ọnwa ochie: This signifies the moon is shrinking in size after being full, similar to the previous phrase.
For something declining or decreasing:
* Ịkwụsị: This means "to cease" or "to stop," suggesting a reduction or stopping of something.
* Ịda mbà: This translates to "to become weak" or "to decline."
* Ịgba mkpụrụ: As mentioned above, this can also be used for something that is diminishing or declining.
* Ịkpa ike: This means "to weaken" or "to diminish" and can be used for strength or power that is decreasing.
For something losing its influence or importance:
* Ịdaba: This translates to "to fall" or "to decline" and can imply losing influence or importance.
* Ịla n'iyi: This means "to become useless" or "to lose its worth," indicating a decrease in value or relevance.
The best Igbo translation for "wane" would depend on the specific context and the nuance you want to convey.
It's always best to consider the specific situation and choose the phrase that best fits the meaning you wish to express.