First opened Tuesday, November 14, 2006

酸性

さんせい

flat (heiban)

How to read it: a line over a kana means the voice is high there, and ↓ marks where it drops. A kana with no line is low. With no ↓ the pitch stays high to the end and does not drop even on a following particle (が, は).

acidity

JLPT N3Commonnoun (common) (futsuumeishi)chemistry漢語 · Sino-JapaneseCompound

Sansei is 酸 (san, “acid”) plus 性 (-sei, “-ity”).

Taken apart

Select a part to see every word so far that is taken apart with it.

Written with 酸性

In a sentence

パイナップルやレモンのような酸性(さんせい)の果実(かじつ)はすっぱい。
Acid fruits like pineapples and lemons are sour.
Tatoeba #198334, translation #35526

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.

“酸(さん) (san, “acid”) + 性(せい) (-sei, “-ity”)”

Source: Wiktionary: 酸性 (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).

What the labels mean

漢語 Sino-Japanese: Words built from Chinese-derived morphemes — borrowed from Chinese or coined in Japan out of Chinese parts — read with on'yomi.
Compound: Two or more words or stems joined into one.

Related in the dictionary

The words JMdict points to from this word's sense. A word that has opened links to its day; the others are named as JMdict writes them.

Opposite: 塩基性

Also read さんせい

Other words so far with exactly this reading and another spelling, oldest first, with the pitch accent each entry shows: where they differ, the pitch tells the words apart in speech. Only the readings are compared; nothing is claimed about how the words are related.

酸性This word
acidity
さんせい flat (heiban)
賛成
approval, agreement
さんせい flat (heiban)

Other words so far that share a part, a process or a layer with this one, closest first. Each tag says what is shared; nothing here is a claim beyond what the entries already show.

Also opened on November 14

The words that opened on this day of the year in other years, oldest first. They share only the date: nothing else links them.