vinegared kombu; sour kombu with black vinegar
A snack or ingredient made from kombu kelp seasoned with black vinegar, often sweetened. Common in Japanese home cooking and as a packaged snack.
The vinegared kombu my grandmother made is sweet and sour and very delicious.
Adding vinegared kombu to rice balls gives them a refreshing taste.
酢の物 is a general term for vinegared dishes, whereas 酢昆布 specifically refers to vinegared kombu.
Compound of 酢 (su, 'vinegar') and 昆布 (konbu, 'kombu kelp'). The reading すこんぶ is a straightforward combination of the two components.