瓦（かわら、kawara）
- roof tile

The word 瓦 (kawara) primarily refers to roof tiles. These tiles are typically made of clay and are used to cover the roofs of buildings, protecting them from the elements such as rain, snow, and sunlight. 瓦 can also broadly refer to similar materials or objects made in a similar way, such as ceramic tiles used for other purposes.

⚫︎屋根に瓦が乗っている。 Translation: There are roof tiles on the roof. ⚫︎ 古い瓦が割れてしまった。 Translation: The old roof tiles broke. ⚫︎ 美術館には、様々な形の瓦が展示されている。 Translation: Various shapes of roof tiles are displayed in the museum.

This word is used when discussing roof construction, architecture, or related topics. You would use 瓦 when describing the materials used for a roof, the condition of a roof, or historical building features.

⚫︎ The word is typically written in kanji as 瓦. ⚫︎ The reading is かわら in hiragana. ⚫︎ There is no katakana version commonly used. ⚫︎ The okurigana (suffix hiragana) is not applicable in this case.

⚫︎ 屋根（やね - roof） ⚫︎ 陶器（とうき - ceramics) - In a broader sense, if the context is about the material.

There aren't direct antonyms in the same sense. However, depending on the context, you might consider alternatives to 瓦 materials for roofing, such as: ⚫︎ トタン (totan - corrugated iron sheet) ⚫︎ スレート (surēto - slate)

古いお寺の屋根には、美しい瓦が使われている。 ・Translation: Beautiful roof tiles are used on the roof of the old temple. ・Explanation: This sentence describes the appearance of roof tiles on a traditional building.

地震で家の瓦が落ちてしまった。 ・Translation: The roof tiles of the house fell off in the earthquake. ・Explanation: This sentence describes the damage caused by an earthquake to roof tiles.

The etymology of 瓦 is not definitively known but is believed to have originated from China, where the technology of producing roof tiles was developed. The word itself has been used in Japanese for centuries and is associated with the construction of buildings.