Where does “laisteas” come from?

laisteas (Irish) comes from Irish theas, from Old Irish tess, from Proto-Celtic texstus, from Proto-Indo-European tep- — to be warm, be hot.

laisteas (Irish): on the south side

Definitions

  1. on the south side

Ancestry of “laisteas”, step by step

laisteas traces back through two separate lines of ancestry.

via Irish theas

StepLanguageWordMeaning
1Irishtheassouth, southern; in the south; Lenited form of...
2Old Irishtessheat, warmth
3Proto-Celtictexstusheat, warmth
4Proto-Indo-Europeantep-to be warm, be hot

via Proto-Indo-European las-

StepLanguageWordMeaning
1Proto-Indo-Europeanlas-to be willing, covetous; weak; eager
Every word from Proto-Indo-European tep- →Every word from Proto-Celtic texstus →Every word from Old Irish tess →