1. 空
  2. 洞

空

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Meta:

  1. 空 is the 272nd most frequent character.
  2. 空 has 2 dictionary entries.
  3. 空 appears as a character in 148 words.
  4. 空 appears as a component in 9 characters.

Decomposition:

Once :
空 => 穴, 工
Radical :
空 => 穴 (cave), 工 (work)
Graphical :
空 => 冖, 丶, 八, 一, 丨, 一

Pinyin & Meaning:

  1. kong1 - empty/air/sky/in vain
  2. kong4 - to empty/vacant/unoccupied/space/leisure/free time

Pronunciation Clues:

  1. Pronunciation clue for 空 (kong1): The component 工 is pronounced as 'gong1'. It has the same pinyin final.
  2. Pronunciation clue for 空 (kong4): The component 工 is pronounced as 'gong1'. It has the same pinyin final.

Example Words:

High Frequency

天空 
星空 
时空 (時空)
有空 
空 
空气 (空氣)
空虚 (空虛)
空调 (空調)
空间 (空間)
航空 

Medium Frequency

上空 
人去楼空 (人去樓空)
半空 
填空 
夜空 
天马行空 (天馬行空)
太空 
孙悟空 (孫悟空)
悟空 
抽空 
挖空 
横空 (橫空)
海阔天空 (海闊天空)
清空 
真空 
空中 
空位 
空前 
空姐 
空想 
空战 (空戰)
空手 
空旷 (空曠)
空洞 
空无一人 (空無一人)
空白 
空空 
空空荡荡 (空空盪盪)
空腹 
空落落 
空荡荡 (空蕩蕩)
空话 (空話)
空军 (空軍)
空运 (空運)
空闲 (空閒)
空降 
空隙 
空头 (空頭)
空余 (空餘)
落空 
虚空 (虛空)
镂空 (鏤空)
腾空 (騰空)
高空 

Appears In:

空 also appears in:
控腔崆倥箜鞚聜躻鵼

洞

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Previous (础)Next (卷)

Meta:

  1. 洞 is the 1013th most frequent character.
  2. 洞 has 1 dictionary entry.
  3. 洞 appears as a character in 51 words.
  4. 洞 appears as a component in 1 character.

Decomposition:

Once :
洞 => 氵, 同
Radical :
洞 => 氵 (water), 冂 (upside down box), 一 (one), 口 (mouth)
Graphical :
洞 => ⺀, ㇀, 冂, 一, 口

Pinyin & Meaning:

  1. dong4 - cave/hole/zero (unambiguous spoken form when spelling out numbers)/CL:個|个[ge4]

Pronunciation Clues:

  1. Pronunciation clue for 洞 (dong4): The component 同 is pronounced as 'tong2'. It has the same pinyin final.
  2. Pronunciation clue for 洞 (dong4): The component 同 is pronounced as 'tong4'. It has the same pinyin final.

Example Words:

High Frequency

洞 

Medium Frequency

地洞 
山洞 
洞口 
洞天 
洞察 
洞察力 
洞庭湖 
洞悉 
洞房 
洞穴 
溶洞 
漏洞 
破洞 
空洞 
耳洞 
黑洞 
龙洞 (龍洞)

Appears In:

洞 also appears in:
霘
Decomposition Levels:
Level 1: Only divided once. So only two components.
Level 2: Radical Decomposition. The character gets decomposed into its lowest radical components. For the complete list visit the Radical wikipedia page.
Level 3: Graphical Decomposition. Shows all the strokes & lowest level of components that make up the character.
If you see questions marks or too many "block" characters, especially when it comes to level 3 decomposition you might need the correct font.