忽冷忽热 hūlěng-hūrè now hot, now cold
now hot, now cold; (of one's mood, affection etc) to alternate
How to remember 忽冷忽热: 忽 suddenly + 冷 cold + 热 hot = now hot, now cold.
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How it is used
- Now hot, now cold - of temperature or, figuratively, fickle attitude - 天气忽冷忽热 (tiānqì hūlěng-hūrè) the weather keeps swinging hot and cold; 他对我忽冷忽热 (he blows hot and cold with me).
- The 忽…忽… frame means abruptly alternating; here about unstable moods/affection or unsteady conditions.
- Vivid, spoken; common warning about a flaky partner or an unreliable trend.