Where does “Ugiriki” come from?

Ugiriki (Swahili) comes from English greek, from Old English Grēcas, from Esperanto kreko, from Latin Graecus, from Ancient Greek Γραικός, from Ancient Greek γραῖα, from Proto-Indo-European ǵerh₂- — to grow old, to mature.

Ancestry of “Ugiriki”, step by step

Step	Language	Word	Meaning
1	English	greek	Alternative letter-case form of Greek; To display...
2	Old English	Grēcas	the Greeks; Greeks
3	Esperanto	kreko	teal
4	Latin	Graecus	Greek, Grecian, of or pertaining to the Greek...
5	Ancient Greek	Γραικός	Greek; a Graecian, a member of an ancient...
6	Ancient Greek	γραῖα	Graea, Boeotia; Greece
7	Proto-Indo-European	ǵerh₂-	to grow old, to mature

Every word from Proto-Indo-European ǵerh₂- →Every word from Ancient Greek γραῖα →Every word from Ancient Greek Γραικός →