大気|たいきtaiki[1]atamadaka (head-high)
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- nounatmosphere; air
- nounmagnanimity; generosity
- Synonym気圏きけんWrittenWritten/formal prose and rare: refers to the region the atmosphere occupies. In everyday use, 「大気圏」 is the standard word.
- Synonym大気圏たいきけんNeutralNeutral term for the layer where the atmosphere exists, stressing the region rather than the gas itself, as in 「大気圏に突入する」; 「大気」 is the gas itself.
Use 「大気」 for the air itself, e.g. in talk of air pollution. For the layer or region the atmosphere occupies — space contexts like 「大気圏に突入する」 — use 「大気圏」. 「気圏」 is a rare written variant; say 「大気圏」 instead.
Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only


