Kanji 定 determine, fix, establish Related words 安あん 定てい 安定 means 'stable' in a general sense (emotionally, politically, etc.), while 定常 emphasizes unchanging regularity or equilibrium, often in technical or mathematical contexts.
一いっ 定てい 一定 means 'fixed' or 'constant' as a predetermined value or rule, whereas 定常 describes a state that remains unchanged over time.
Word family stationarity; being stationary
standing wave; stationary wave
steady state
stationary message source; stationary information source
Etymology Compound of 定 (てい , 'fixed, determined') and 常 (じょう , 'usual, constant'). The exact historical derivation is uncertain, but the combination naturally yields the meaning 'regular, stationary'.
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