Where does “հինգիսուն” come from?

հինգիսուն (Old Armenian) comes from Proto-Indo-European penkʷēḱomth₂, from Proto-Indo-European *pénkʷedḱomt.

Ancestry of “հինգիսուն”, step by step

StepLanguageWordMeaning
1Proto-Indo-Europeanpenkʷēḱomth₂
2Proto-Indo-European*pénkʷedḱomt
Every word from Proto-Indo-European *pénkʷedḱomtEvery word from Proto-Indo-European penkʷēḱomth₂