3 Old HSK word(s): 
☊天然 ** C ☊天然气 ** C ☊不免 ** C
Definitions from Unihan Copyright © 1991-2015 Unicode® Inc. All rights reserved.
不 no, not / un- / negative prefix
免 spare / excuse from / evade
Hsk Characters:
HSK -Characters and beyond:
| Gb | Big5 | Eng | Rad | Mega | Triple | Multilingual |
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Korean:
1 NHSK word(s): 自然* 4 zi4 ran2nature/ natural/ naturally
1 KOREAN6000 word(s):
C 자연히 [jayeonhi] Naturally
KOREAN 2500 New HSK words):
KOREAN Sentence(s):
