Where does “giga-” come from?

giga- (English) comes from English Chad, from English ICH, from English ichthyophthiriasis, from English Ichthyophthirius, from Ancient Greek ἰχθύς, from Ancient Greek ἀετός, from Proto-Hellenic ayyetós, from Proto-Indo-European h₂ewyetós — bird.

giga- (English): In the International System of Units and other...

Definitions

  1. In the International System of Units and other...

Ancestry of “giga-”, step by step

giga- traces back through two separate lines of ancestry.

via English Chad

StepLanguageWordMeaning
1EnglishChadA very handsome, usually tall, man whom women...
2EnglishICHInitialism of intracranial hemorrhage; Initialism...
3EnglishichthyophthiriasisA parasitic infection of freshwater fish caused...
4EnglishIchthyophthirius
5Ancient Greekἰχθύςfish
6Ancient Greekἀετόςeagle; the constellation Aquila; omen
7Proto-Hellenicayyetós
8Proto-Indo-Europeanh₂ewyetós
9Proto-Indo-Europeanh₂éwisbird

via Ancient Greek Γίγας

StepLanguageWordMeaning
1Ancient GreekΓίγαςone of the Gigantes; a Gigas
2Ancient GreekΓίγᾱς

Words derived from “giga-

Every word from Proto-Indo-European h₂éwisEvery word from Proto-Indo-European h₂ewyetósEvery word from Proto-Hellenic ayyetós