First opened Thursday, November 19, 2009
誕生日
たんじょうび
Pitch accent: We don't have the data for this section. No accent list gives this spelling and reading, or the two we check against disagree.
birthday
A birthday is a “birth day”, with ひ voiced to び.
Taken apart
Select a part to see every word so far that is taken apart with it.
In a sentence
誕生日はいつですか。
When is your birthday?
誕生日が楽しみだな。
I look forward to my birthday.
Sentences are from Tatoeba (CC BY 2.0 FR), picked by fixed rules from a dated export and shown unchanged. Nobody has reviewed them one by one.
What Wiktionary says
Quoted line by line from Wiktionary's Etymology section for this reading, taken from one dated dump so it can't change underneath us. Nothing below is paraphrased.
- “Compound of 誕生(たんじょう) (tanjō, “birth”) + 日(び) (-bi, “day”).”
- “The hi reading for 日 changes to bi as an instance of rendaku (連濁).”
Source: Wiktionary: 誕生日 (dump of 2026-09-02), available under CC BY-SA 4.0. Reading, meaning and part of speech from JMdict, and kanji readings from KANJIDIC2 (EDRDG).
Other readings of 誕生日 on the same Wiktionary page
These describe other words written the same way, not たんじょうび. They are quoted for context: the parts, layer and processes of this word are not taken from them.
たんじょうにち
- “From 誕生(たんじょう) (tanjō, “birth”) + 日(にち) (-nichi, counter for day of a month).”
What the labels mean
- 混種語 Hybrid
- Words that mix layers, e.g. a native part with a Chinese one.
- Compound
- Two or more words or stems joined into one.
- Rendaku
- The first sound of the second part voices when two native words join (kami → -gami).