火星

Taken apart

1. 火

   か

   fire

2. +

3. 星

   せい

   star

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

Wiktionary's text doesn't split this word, so each part is one of its kanji (with the okurigana written after it), with the reading and the dictionary meaning KANJIDIC2 gives that character — a word doesn't always use every sense of its kanji.

Written with 火星

In a sentence

• 火星(かせい)には生物(せいぶつ)の形跡(けいせき)はない。

  There is no sign of life on Mars.

  Tatoeba #186655, translation #23791

• 人間(にんげん)は火星(かせい)では生存(せいぞん)できない。

  Humans can't live on Mars.

  Tatoeba #144305, translation #270261

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.

• “/kwasei/ → /kaseː/”
• “From Middle Chinese 火星 (MC xwaX seng, literally “fire star”).”

Source: Wiktionary: 火星 (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.

Borrowing

Taken over from another language.

Sound change

The pronunciation shifted over the centuries.