Where does “raider” come from?

Raider derives from English raid plus the agent suffix -er, ultimately tracing through Old French -er, Latin -āre (infinitive marker), and Latin -ārius (agent noun suffix denoting one who performs an action).

raider (English): One who engages in a raid; a plunderer; A person...

Definitions

  1. One who engages in a raid; a plunderer; A person...

Ancestry of “raider”, step by step

raider traces back through two separate lines of ancestry.

via English rīder

StepLanguageWordMeaning
1Englishrīder
2Englishboardridersurfer
3EnglishriderOne who rides, often on a horse or a motorcycle;...
4Middle EnglishridereAlternative form of ryder
5Middle EnglishryderA rider or equestrian; one who rides a horse; A...
6Old Englishrīdererider, knight
7Old Englishrīdanto ride
8Proto-West Germanicrīdanto ride
9Proto-Germanicrīdanąto ride
10Proto-Indo-Europeanrēydʰ-
11Proto-Indo-Europeanh₂er-to fit, to fix, to put together

via English raid

StepLanguageWordMeaning
1EnglishraidA quick hostile or predatory incursion or...
2Scotsraidraid
3Middle Englishradequick, fast, speedy; rash, hasty, angry; eager
4Old Englishrādroad; riding, hostile incursion; riding, road
5Proto-West Germanicraiduriding, ride
6Proto-Germanicraidōride, journey; name of the R-rune
7Proto-Indo-Europeanh₃reyH-to move, set in motion
8Proto-Indo-Europeanh₃er-to move, to stir; to rise, to spring; to quarrel,...
Every word from Proto-Indo-European h₂er-