This is the 84th most frequent Finnish word.
niiden
"Niiden" means "their" or "of those" in English.
The word 'niiden' refers to 'of them,' with 'niiden mukana' forming the context of 'with them.'
Niiden mukana tuli pieni paketti.
A small package came with them.
The word 'niiden' is used in the possessive sense, meaning 'inside them.'
Katselin niiden sisälle ja näin jotain mielenkiintoista.
I looked inside them and saw something interesting.
The word 'niiden' is utilized possessively, meaning 'their,' describing ownership or attribute.