Where does “legnyugtalanítóbb” come from?

legnyugtalanítóbb (Hungarian) comes from Hungarian nyugtalanítóbb, from Hungarian nyugtalanító, from Hungarian nyugtalanít, from Hungarian nyugtalan, from Hungarian nyugszik, from Hungarian -szik, from Hungarian -sz, from Proto-Slavic sь — whale, sea monster; abyss.

Ancestry of “legnyugtalanítóbb”, step by step

StepLanguageWordMeaning
1Hungariannyugtalanítóbb
2Hungariannyugtalanítóworrying, worrisome, disquieting causing worry or unease
3Hungariannyugtalanítto worry to make somebody worried
4Hungariannyugtalanrestless; worried
5Hungariannyugszikto rest; to set
6Hungarian-szikAppended to a noun, adjective, verb or other stem...
7Hungarian-szUsed to form the second-person singular present...
8Proto-Slavicthis
9Proto-Balto-Slavicśisthis here
10Proto-Indo-Europeanḱísthis
11Proto-Indo-EuropeanḱeDeictic particle, here; Post-positional...
12Middle Englishkyt
13Russianкитwhale; genitive plural of ки́та
14Old Church Slavonicкитъwhale
15Ancient Greekκῆτοςwhale, sea monster; abyss
Every word from Ancient Greek κῆτοςEvery word from Old Church Slavonic китъEvery word from Russian кит