Where does “زیرزمین” come from?

زیرزمین (Persian) comes from Persian زمین, from Persian زمی, from Middle Persian zmyk', from Proto-Iranian *jā́h, from Proto-Indo-Iranian *ȷ́ʰžʰā́s, from Proto-Indo-European dʰéǵʰōm, from Proto-Indo-European -ōm, from Proto-Indo-European -mi.

زیرزمین (Persian): cellar, basement

Definitions

  1. cellar, basement

Ancestry of “زیرزمین”, step by step

زیرزمین traces back through two separate lines of ancestry.

via Persian زمین

StepLanguageWordMeaning
1Persianزمینearth; Earth; land
2PersianزمیAlternative form of زمین
3Middle Persianzmyk'earth
4Proto-Iranian*jā́hearth
5Proto-Indo-Iranian*ȷ́ʰžʰā́sthe ground, earth
6Proto-Indo-Europeandʰéǵʰōmearth
7Proto-Indo-European-ōmemphatic suffix or postpositive particle
8Proto-Indo-European-mi

via Persian زیر

StepLanguageWordMeaning
1Persianزیرhigh-pitched; kasra; underneath
2Middle Persianazērunder

Words derived from “زیرزمین

Every word from Proto-Indo-European -miEvery word from Proto-Indo-European -ōmEvery word from Proto-Indo-European dʰéǵʰōm