Where does “nettihyökkäys” come from?

nettihyökkäys (Finnish) comes from Finnish netti, from English internet, from English internetwork, from English network, from English Net, from Middle English net, from Anglo-Norman neit, from Old French net.

Ancestry of “nettihyökkäys”, step by step

nettihyökkäys traces back through two separate lines of ancestry.

via Finnish netti

StepLanguageWordMeaning
1FinnishnettiInternet, the Net
2EnglishinternetAny set of computer networks that communicate...
3EnglishinternetworkA network of networks; To set up as a network of...
4EnglishnetworkA fabric or structure of fibrous elements...
5EnglishNetthe Internet
6Middle Englishnetworthy, good, pure, fine, elegant
7Anglo-Normanneitgood, desireable, clean
8Old Frenchnetneat, decent
9Vulgar Latinnittus
10Latinnitidusshining, polished, glittering; handsome,...
11Latinniteresecond-person singular future active indicative...
12LatinniteoI am radiant, shine, look bright, glitter,...
13Proto-Indo-Europeanney-to shine; to be aroused, shine; to be excited
14Cebuano-hi

via Finnish hyökkäys

StepLanguageWordMeaning
1Finnishhyökkäysattack
2FinnishhyökätäTo attack, assault, charge, come at; To invade
Every word from Cebuano -hiEvery word from Proto-Indo-European ney-Every word from Latin niteo