frost, ice, snow; frosty weather; cold, chilliness (of old age/death/fear)
Latin word, found 73 times in the texts on Socratos.
Vergil, Georgics 2.317: Rura gelu tum claudit hiems nec semine iacto
Lucretius, De Rerum Natura 6.877: dimittat; quasi saepe gelum, quod continet in se,
Phaedrus, Fabulae 4.19.2: Gelu rigentem quidam colubram sustulit
All forms of gelus