constant
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- 1 constant、unchanged、stable
Describes a value, level, position, or condition that stays constant instead of changing or fluctuating.
constant、unchanged、stable
Describes something that remains at the same value, level, position, or condition over time.
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อุณหภูมิคงที่ unhaphuum khoŋ thîi The temperature is constant. อุณหภูมิคงที่ details
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รักษาระดับน้ำให้คงที่ ráksǎa rádàp náam hây khoŋ thîi Keep the water level constant. รักษาระดับน้ำให้คงที่ details
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ราคายังคงที่ raakhaa yaŋ khoŋ thîi The price remains unchanged. ราคายังคงที่ details
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สัญญาณไม่คงที่ sǎnyaan mây khoŋ thîi The signal is unstable. สัญญาณไม่คงที่ details
Learning notes
Explanation
The core idea of คงที่ is remaining at the same level or in the same condition without fluctuation. It is especially common with measurable quantities such as temperature, speed, prices, rates, and water levels. It commonly follows a noun, as in ความเร็วคงที่ (“constant speed”) and อุณหภูมิคงที่ (“constant temperature”). The pattern รักษา…ให้คงที่ means “keep … constant.” Its negative form, ไม่คงที่, describes something that varies or is unstable.
Usage
It is often used when discussing measurable values such as temperature and speed, economic figures such as prices and income, or the stability of machines and communication signals. It is used in everyday language but is especially common in scientific, technical, and economic contexts.
Caution
คง by itself can express probability, roughly “probably” or “likely,” but คงที่ does not normally have that meaning. To say that a person stays still in one place, อยู่นิ่ง ๆ or อยู่กับที่ is usually more natural.
Differences from similar words
1 constant synonyms
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มั่นคง describes something as secure, firm, or reliably established, such as a structure, career, or relationship. คงที่ more specifically describes a value, level, or condition that remains constant.
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เหมือนเดิม means “the same as before” and explicitly compares the present with an earlier state. คงที่ emphasizes that a value or condition does not fluctuate over time.