Where does “väitöslause” come from?

väitöslause (Finnish) comes from Finnish väitös, from Finnish väittää, from Finnish väki, from Icelandic vaki, from Arabic وَاقِع, from Arabic النَّسْر الوَاقِع — falling eagle.

Ancestry of “väitöslause”, step by step

väitöslause traces back through two separate lines of ancestry.

via Finnish väitös

Step	Language	Word	Meaning
1	Finnish	väitös	dissertation
2	Finnish	väittää	To claim, contend, assert, argue, maintain; to...
3	Finnish	väki	people, crowd; power, strength, force
4	Icelandic	vaki	hormone
5	Arabic	وَاقِع	happening, occurring; falling
6	Arabic	النَّسْر الوَاقِع	falling eagle

via Finnish lause

Step	Language	Word	Meaning
1	Finnish	lause	clause; sentence; theorem
2	Finnish	lausua	to say, speak, utter, pronounce; to pronounce,...
3	Proto-Finnic	lausudak	to say

Every word from Arabic النَّسْر الوَاقِع →Every word from Arabic وَاقِع →Every word from Icelandic vaki →