垠 (yín) — (bound form) boundary, limit | tongtong Chinese Dictionary

Definition

垠 (yín) is a literary bound form meaning 'boundary / limit', almost always seen in the set phrase 无垠 ('boundless'). You will not use it on its own.

bound form

boundarylimit

Easily confused

，。
Zài wú yín de yǔ zhòu zhōng, rén lèi xiǎn de hěn miǎo xiǎo.
In the boundless universe, humans seem very small.
，。
Zhè piàn cǎo yuán yí wàng wú yín, fēi cháng zhuàng guān.
This grassland stretches endlessly, very spectacular.
。
Tā de xiōng huái xiàng dà hǎi yí yàng wú yín.
His mind is as boundless as the ocean.

Sound + meaning

六书liùshū

形声xíngshēng

Most characters — around four in five — are built this way: one part hints at the meaning, the other at the pronunciation.

土艮垠

Meaning part形符xíngfú

土土tǔsoil

Sound part声符shēngfú

艮

The sound has drifted apartThe sound part was a clue two thousand years ago — it often still helps, but not always.

垠 combines 土 (soil) with 艮. The 土 part relates to the meaning, and 艮 gives the pronunciation.