Where does “tiukentua” come from?

tiukentua (Finnish) comes from Finnish tiukentaa, from Finnish tiukka, from Swedish tjock, from Old Swedish thiokker, from Old Norse þykkr, from Proto-Germanic þekuz, from Proto-Indo-European tégus, from Proto-Indo-European teg-.

Ancestry of “tiukentua”, step by step

StepLanguageWordMeaning
1Finnishtiukentaato tighten
2Finnishtiukkatight; taut; sharp
3Swedishtjockthick; overweight, fat
4Old Swedishthiokker—
5Old Norseþykkrthick
6Proto-Germanicþekuzthick
7Proto-Indo-Europeantégusthick
8Proto-Indo-Europeanteg-—
Every word from Proto-Indo-European teg- →Every word from Proto-Indo-European tégus →Every word from Proto-Germanic þekuz →