Meta:

  1. 吉 is the 854th most frequent character.
  2. has 2 dictionary entries.
  3. appears as a character in 86 words.
  4. appears as a component in 19 characters.

Decomposition:

Once :
=> ,
Radical :
=> (scholar), (mouth)
Graphical :
=> , , ,

Pinyin & Meaning:

  1. Ji2 - surname Ji/abbr. for Jilin Province 吉林省[Ji2 lin2 sheng3]
  2. ji2 - lucky/giga- (meaning billion or 10^9)

Pronunciation Clues:

  1. Pronunciation clue for 吉 (ji2): The component 士 is pronounced as 'shi4'. It has the same pinyin final.

Example Words:

High Frequency

吉祥 
大吉 
大吉大利 

Medium Frequency

 
吉他 
吉利 
吉林 
吉祥物 
吉隆坡 
万事大吉 (萬事大吉)
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.