Where does “sub-zero” come from?

sub-zero (English) comes from English zero, from Middle French zero, from Italian Zero, from New Latin zerum, from Medieval Latin zephirum, from Arabic صِفْر, from Sanskrit शून्य, from Proto-Indo-European ḱówH-.

sub-zero (English): below 0°C; freezing cold

Definitions

  1. below 0°C; freezing cold

Ancestry of “sub-zero”, step by step

StepLanguageWordMeaning
1EnglishzeroThe cardinal number occurring before one and that...
2Middle Frenchzero
3ItalianZerozero
4New Latinzerum
5Medieval Latinzephirumzero
6Arabicصِفْرzero, nothing, empty, void; nothing, cipher;...
7Sanskritशून्यzero; cipher, cypher; blank, deserted
8Proto-Indo-EuropeanḱówH-
Every word from Proto-Indo-European ḱówH-Every word from Sanskrit शून्यEvery word from Arabic صِفْر
sub-zero — Etymology, Origin & Word History | Etymology Explorer