気体

• Reading: きたい
• Romaji: kitai
• Kanji breakdown: 気 (ki) — air, spirit; 体 (tai) — body, substance
• Pronunciation: /ki.ta.i/

Meaning

Gas; vapor. One of the three states of matter, where molecules move freely.

A scientific noun referring to the gaseous state of matter. Used in chemistry and physics education as part of the trio: 固体 (solid), 液体 (liquid), 気体 (gas). Common in school science classes and technical discussions. Not used for colloquial references to gas (ガス is used for fuel gas or flatulence).

Examples

1. 水は百度で気体になる。 I have high expectations for the new project.
2. 気体は目に見えないものが多い。 I studied hard to meet my parents' expectations.
3. 理科の授業で気体の性質を学んだ。 It wasn't as interesting as I had expected.

Usage Guide

Context: science, education, chemistry

Tone: neutral

Origin & History

Composed of 気 (air, spirit, energy) and 体 (body, substance). Together they describe the substance of air — matter in its gaseous form.

Cultural Context

Era: Modern

Generation: Students and scientists

Social background: Universal