Where does “فروسرخ” come from?

فروسرخ (Persian) comes from Persian سرخ, from Persian سهر, from Middle Persian swhr — red.

فروسرخ (Persian): infrared

Definitions

  1. infrared

Ancestry of “فروسرخ”, step by step

فروسرخ traces back through two separate lines of ancestry.

via Persian سرخ

StepLanguageWordMeaning
1Persianسرخscarlet, red color
2Persianسهر—
3Middle Persianswhrred

via Persian فروـ

StepLanguageWordMeaning
1Persianفروـ—
Every word from Middle Persian swhr →Every word from Persian سهر →Every word from Persian سرخ →