Wiktionary:About Japanese/Etymology

Outline
Basic tasks in the etymology of a Japanese entry include:
 * Breaking up compounds.
 * Tracing word change: pronunciation, spelling, and meaning;
 * Giving ultimate word origins: often other language, a coinage, or sound symbolism.

Breaking up compounds
Show which terms combine to create the compound: Indicate regular or irregular sound changes in the compound:
 * use ;
 * indicate rendaku, by using ;
 * indicate irregular sound combinations, such as the following for :
 * Compound of . The irregular same reading for  is thought to be a likely holdover from an Old Japanese pronunciation, or possibly an example of epenthesis.

For example, here is the etymology section for the entry: ===Etymology=== Compound of. The fue changes to bue due to.

Word change
In detail, etymology traces where words come from, and how they change. In Japanese this is somewhat complicated by the use of kanji – thus firstly, old pronunciations are not transparent from the writing, and secondly, the kanji may change.


 * Phonetic changes: Many s in Japanese are quite regular, hence older forms of words can be deduced from knowing sound changes over time:
 * initial /h-/: [p] > [ɸ] > [h]; medial /-h/: [p] > [ɸ] > [w] (see topic case は)
 * /w/ becomes zero before -i, -e, and -o; (see accusative case を)
 * /i, wi/ and /e, ye/ merge into /i/, /e/ respectively
 * /au/ elides into [ɔː] > [oː], while /ou/ and /eu/ elide into [oː] and [yoː], respectively
 * /zi, di/ and /zu, du/ merge into /zi/ and /zu/, respectively
 * voiced obstruents were initially prenasalized: /g/ [ng], /z/ [nz], /d/ [nd], /b/ [mb]
 * like /si/, /se/ was initially palatalized [ɕe]
 * This is often called “historical readings” of kanji, though properly, the sound changes occurred independent of any writing of them. Note that Japanese dictionaries often anachronistically give historical readings of modern terms; these may be included, but should be flagged as such, to not give the impression that these were an actual older form of the word.


 * Change in spelling: The kanji used to write a word may change: is a good example. Further, Japanese spelling was reformed in 1946: for kana,  with, while for kanji,  was replaced with.
 * Change in meaning : This is as in other languages.

Grammar
The modern verbal conjugation classes are a direct result of their historical ones.
 * the quintigrade conjugation results from the quadrigrade due to the elision of /au/ to [ɔː] > [oː]
 * the the bigrade conjugations (上二段 and 下二段 become monogrades (上一段 and 下一段) due to the merger of the conclusive and attributive bases
 * the conclusive and attributive bases merge
 * the realis transitions into the hypothetical base

All modern adjectives ending in -i derive from an early form ending in -ki where the medial -k- drops out. This is the attributive base which overtook the conclusive. For example:
 * katashi > kataki > katai

Origins
Japanese words that originate in another or older language fall into three main classes: words from Old Japanese (and Proto-Japonic before that), old Chinese borrowings, and modern borrowings. In detail:


 * : (Old) Japanese words – historically Japanese words
 * Yamato kotoba, also known as ; these originate in Old Japanese.
 * Please indicate these with.
 * Note that there have been some sound mergers since Old Japanese, so two words that are pronounced identically today may have been different words in Old Japanese, and thus warrant separate etymologies; a good example is かみ, where was kami2 and  was kami1, though these are both now kami.
 * : Chinese words – Chinese borrowings, from several stages through history.
 * Kango ; these are generally written in kanji.
 * Please indicate these with, or (for “Chinese” and “Literary Chinese”, respectively); the ISO codes for various stages of Chinese are not very finely divided, and there is as yet no Wiktionary standard on how to classify borrowings from various points in time (・・). Please do not use zh, as that is used to indicate modern Mandarin Chinese, which is incorrect – Mandarin did not exist when historical borrowings from Chinese occurred, and modern Mandarin borrowings are generally considered gairaigo and written in katakana, like other foreign languages, not kanji; see below.
 * The term ‘kango’ is also used for Japanese coinages from Chinese roots, more specifically called or "Japanese-coined Chinese words".  As these are Japanese coinages, they should be indicated as follows:
 * Compound of .
 * – (Modern) Foreign borrowings, mostly European
 * These are written in katakana. Words were imported from Portuguese in the 15th and 16th century, then from Dutch from 1609 to 1854, then from French and German during the early Meiji Period, and now primarily from English. Modern Chinese borrowings are considered gairaigo, and written in katakana.
 * Please indicate these with, where xx is the ISO 639 code for the originating language. For example, use pt for borrowings from Portuguese, nl for borrowings from Dutch, en for borrowings from English, and zh for borrowings from modern Mandarin Chinese.
 * Note that due to similarities between European languages, particularly English and Dutch, it is easy to mistake which European language a word came from. For instance,  comes from Dutch, not English.
 * See:

Word formation

 * See: 

Japanese produces words in a number of ways.

Coinages

 * : Japanese-coined Chinese words – compare with s in English
 * These consist of combining kanji to form new words.
 * Wasei eigo
 * These consist of combining English or other words to form a new Japanese word, which is not a foreign borrowing. For example,.
 * See:

Rarer coinages include (also written ), such as.

Conversely, many Japanese words are formed by abbreviating or contracting other words, such as from. See:

Sound symbolism

 * See: and 

Japanese is unlike English in widely using many types of sound symbolism. These are often incorrectly all called “onomatopoeia” in English, but come instead in several varieties.

(elaborate)

Descendants

 * See: 

Japanese words have been borrowed into other languages in a number of ways.


 * Wasei-kango have been loaned into Chinese and Korean, and sometimes Vietnamese (such as câu lạc bộ), with characters pronounced in the local way.
 * , especially in Peru
 * , especially in Peru
 * , especially in Peru

Templates
Useful templates include:
 * Ideal use of this takes the format:
 *  
 * For example:
 * <tt> </tt>
 * Which produces:
 * Using the template with the <tt>ja</tt> language code links explicitly to the Japanese entry, thereby avoiding confusion with any entries under the same headword for Chinese, Korean, and sometimes Vietnamese or the.
 * The kana and romaji transcriptions are very useful to learners and English readers; ideally they should be linked, as non-lemma forms are included within the scope of Wiktionary.
 * Category:Japanese templates
 * <tt> </tt>
 * Which produces:
 * Using the template with the <tt>ja</tt> language code links explicitly to the Japanese entry, thereby avoiding confusion with any entries under the same headword for Chinese, Korean, and sometimes Vietnamese or the.
 * The kana and romaji transcriptions are very useful to learners and English readers; ideally they should be linked, as non-lemma forms are included within the scope of Wiktionary.
 * Category:Japanese templates
 * Category:Japanese templates