liǎng两twoxiǎo小youngwú无nocāi猜suspicion
Two children with no guardedness between them — innocent childhood companions.
Literal meaning
two (两) — young (小) — no (无) — suspicion (猜)
Origin
From Li Bai's poem 《长干行》: 同居长干里，两小无嫌猜 — describing a couple who grew up together as children with no suspicions or boundaries. The compressed four-character version became shorthand for childhood-friend bonds, especially ones that develop into romance later.
Examples
Tā他men们liǎ俩liǎng两xiǎo小wú无cāi猜，cóng从xiǎo小yì一qǐ起zhǎng长dà大。
Those two have been close since childhood — grew up together.
Tā他men们shì是liǎng两xiǎo小wú无cāi猜de的qīng青méi梅zhú竹mǎ马。
They're childhood sweethearts who've known each other from kid-hood.
Usage & nuances
Nostalgic, slightly literary. Especially common as a setup for childhood-romance narratives.
Learn idioms by speaking them
Idioms are most useful when they land in a real conversation. Practice them out loud in Kango — get instant feedback on tone and timing.
Download Kango on iOS