Pinyin: yin1 yi4 Definition: transliteration (rendering phonetic value, e.g. of English words in Chinese characters)/characters giving phonetic value of Chinese word or name (when the correct characters may be unknown)/transcription (linguistics)/to transcribe phonetic symbols
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.