Where does “sea flea” come from?

sea flea (English) comes from English sea, from Middle English see, from Old English sǣ, from Proto-West Germanic saiwi, from Proto-Germanic saiwiz, from Proto-Germanic sīhwaną, from Proto-Indo-European seykʷ-, from Proto-Indo-European sey- — to be wet; dribble; run; to stretch one's arm;...

sea flea (English): The sand flea

Definitions

  1. The sand flea

Ancestry of “sea flea”, step by step

sea flea traces back through two separate lines of ancestry.

via English sea

StepLanguageWordMeaning
1EnglishseaA large body of salt water; A lake, especially if...
2Middle Englishseesea, ocean; A body of water, a lake; seat, chair
3Old Englishsea, lake
4Proto-West Germanicsaiwisea
5Proto-Germanicsaiwizsea, ocean
6Proto-Germanicsīhwanąto filter
7Proto-Indo-Europeanseykʷ-to moisten; to filter
8Proto-Indo-Europeansey-to be wet; dribble; run; to stretch one's arm;...

via English flea

StepLanguageWordMeaning
1EnglishfleaA small, wingless, parasitic insect of the order...
2Middle Englishfleflea
3Old Englishflēa
4Proto-West Germanicflauhflea
5Proto-Germanicflauhazflea
6Proto-Indo-Europeanplówkos
7Proto-Indo-Europeanplúsisflea
Every word from Proto-Indo-European sey-