Where does “sea” come from?

sea (Irish) comes from Irish is, from Old Irish ís, from Proto-Celtic ɸīssu, from Proto-Indo-European pedsú, from Proto-Indo-European pṓds, from Proto-Indo-European póds, from Proto-Indo-European ped- — to walk, to step; to stumble, to fall.

sea (Irish): yes; right, well

Definitions

  1. yes; right, well

Ancestry of “sea”, step by step

sea traces back through two separate lines of ancestry.

via Irish is

StepLanguageWordMeaning
1Irishisreduced form of agus; Present/future realis...
2Old Irishísunder, below, beneath
3Proto-Celticɸīssuunder
4Proto-Indo-Europeanpedsú—
5Proto-Indo-Europeanpṓdsfoot
6Proto-Indo-Europeanpódsfoot
7Proto-Indo-Europeanped-to walk, to step; to stumble, to fall

via Irish ea

StepLanguageWordMeaning
1Irisheait
2Old Irishedit; space, distance, interval; extent, length
3Proto-Indo-Europeanísthis, he (used as the 3rd person pronoun)
Every word from Proto-Indo-European ped- →Every word from Proto-Indo-European póds →Every word from Proto-Indo-European pṓds →