Definition

1. Adverb:
   • Gently, slowly, at a low intensity: Describes the action of cooking or heating something with a very low, gentle flame or heat. It emphasizes maintaining a low temperature for a slow cooking process.

Usage Examples

• Adverb:
  • Mẹ đun nước sâm riu riu trên bếp. (Mom is simmering the herbal tea gently on the stove.)
  • Kho thịt phải để lửa riu riu mới ngon. (To braise meat, you must keep the heat low and slow for it to be delicious.)
  • Nồi canh sôi riu riu. (The pot of soup is simmering gently.)

Advanced Usage

• "Lửa riu riu": A common collocation meaning a very low, gentle flame.
  • Hãy giữ lửa riu riu trong hai giờ. (Keep it at a low simmer for two hours.)
• Used to describe not just fire, but any slow, gentle, and steady action or state.
  • Mưa rơi riu riu. (The rain falls in a gentle drizzle.)

Variants and Related Words

• Rì rào (onomatopoeia/adverb): Rustling, murmuring (often for wind, leaves, or soft sounds). While not a direct variant, it shares the phonetic repetition and conveys a soft, continuous quality.
• Lâm râm (adverb): Drizzling lightly (for rain); also used for murmuring. Similar in describing something light and continuous.

Synonyms

• Nhỏ lửa: (To cook) on low heat.
• Âm ỉ: Smoldering, burning slowly without flame; can describe a low, persistent fire or feeling.

Related Phrases

• Đun/Kho/Nấu riu riu: To simmer/braise/cook on very low heat.
  • Bí quyết món này là đun riu riu. (The secret to this dish is to simmer it on a very low flame.)

Related Idioms

• While "riu riu" itself is not typically part of a fixed idiom, the concept is central to Vietnamese cooking idioms that emphasize patience and careful control, such as the general principle (braise on low heat).

1. Low
   • Đun lửa riu riu
     To make a low fire