Character Contained In References Comments
External references for 凹
Zhongwen.com traditional etymology dictionary
International Encoded Han Character and Variants Database
ChineseEtymology.org
Unihan database
Cojak Hanzi Dictionary
Tower of Babel spoken word etymology database
ZDIC.net Chinese-Chinese Dictionary
Usage rank 3475
Kang Xi radical 17.3
Big5 code A557
Number of strokes 5
Karlgren 1291
GSR