noun
small water spring
Archaic noun for a small natural spring or welling water source. Not used in modern everyday Japanese; encountered mainly in classical literature or historical descriptions.
古い和歌に「いさら井」という言葉が詠まれている。
The word 'isara-i' appears in old waka poetry.
The derivation is uncertain. The kanji いさら井 and 細小井 are likely ateji or conventional spellings for the native word いさらい, which may be related to いさら (small, fine) and 井 (well, spring).