Way 1 · best default
It's a kind of
You know what group it belongs to, so you name the group and add one detail.
Examples
It's a kind of pancake, but crispy, with prawns inside.
It's a kind of long silk dress that women wear for Tet.
In a conversation
A: What did you have for dinner?
B: Banh xeo. It's a kind of crispy pancake. You wrap it in lettuce.
Common mistake
Not: I don't know how to say it in English.
Say: It's a kind of sweet bread, a bit like a bun.
Stopping there leaves a silence. Describe it instead: what kind of thing it is, what it's like, what it's for.
