Where does “thusand” come from?

thusand (Middle English) comes from Old English þūsend, from Proto-West Germanic þūsundi, from Proto-Germanic þūsundī, from Proto-Indo-European tuHsont-, from Proto-Indo-European tewh₂- — to swell; to crowd; to be strong.

Ancestry of “thusand”, step by step

StepLanguageWordMeaning
1Old Englishþūsendthousand
2Proto-West Germanicþūsundithousand
3Proto-Germanicþūsundīa thousand
4Proto-Indo-EuropeantuHsont-thousand
5Proto-Indo-Europeantewh₂-to swell; to crowd; to be strong
Every word from Proto-Indo-European tewh₂- →Every word from Proto-Indo-European tuHsont- →Every word from Proto-Germanic þūsundī →
thusand — Etymology, Origin & Word History | Etymology Explorer