This is the 497th most frequent Estonian word.
paika
"Paika" in Estonian means "place" or "spot."
Here, "paika" refers to a specific location or place where something belongs.
Ma panin raamatu paika.
I put the book back in its place.
Here, "paika seadma" is an expression used to indicate that something is established or made clear.
Me seadsime plaani paika.
We set the plan in place.
In this usage, "paika pidama" is an expression meaning something is valid or holds true.