also: つや
noun
rainy night
Refers to a night when it is raining. Often used in literary or poetic contexts.
雨夜の月は見えない。
You can't see the moon on a rainy night.
彼は雨夜に一人で歩くのが好きだ。
He likes walking alone on rainy nights.
More common and straightforward way to say 'rainy night' in modern Japanese. 雨夜 is a more compact, literary compound.
Compound of 雨 (rain) and 夜 (night). The reading あまよ uses the older combining form あま for 雨, while つや is a less common reading.