Where does “тугой” come from?
тугой (Russian) comes from Old East Slavic тугъ, from Proto-Slavic tǫgъ, from Proto-Indo-European tengʰ-, from Proto-Indo-European ten- — to stretch, to extend.
Ancestry of “тугой”, step by step
| Step | Language | Word | Meaning |
|---|
| 1 | Old East Slavic | тугъ | — |
| 2 | Proto-Slavic | tǫgъ | tight, solid, tough |
| 3 | Proto-Indo-European | tengʰ- | to pull; to be heavy, difficult |
| 4 | Proto-Indo-European | ten- | to stretch, to extend |