Where does “avo-ojitus” come from?

avo-ojitus (Finnish) comes from Finnish ojitus, from Finnish ojittaa, from Finnish -ittaa, from Finnish -ttää, from Proto-Finnic -ttadak, from Proto-Uralic -kta-.

avo-ojitus (Finnish): open-ditch drainage

Definitions

open-ditch drainage

Ancestry of “avo-ojitus”, step by step

Step	Language	Word	Meaning
1	Finnish	ojitus	ditching, trenching, draining
2	Finnish	ojittaa	To ditch, to cut a trench
3	Finnish	-ittaa	Variant of -ttaa used with some bisyllabic stems
4	Finnish	-ttää	Front vowel variant of -ttaa
5	Proto-Finnic	-ttadak	Creates causative verbs from regular verbs,...
6	Proto-Uralic	-kta-	—

Every word from Proto-Uralic -kta- →Every word from Finnish -ttää →Every word from Finnish -ittaa →