|Kanji in this term|
|つま > ずま|
- 電 (rare)
Compound of 稲 (ina, “rice plant”, ancient bound-form reading of modern ine) + 妻 (tsuma, “wife, spouse”) or 夫 (tsuma, “husband, spouse”). The tsuma changes to zuma as an instance of rendaku (連濁).
A belief in ancient times was that rice plants would mate with or otherwise be fertilized by lightning, a frequent occurrence in the late summer and autumn when rice plants come to fruition.