This is the 911th most frequent Finnish word.
samassa
"Samassa" means "in the same" in English.
Here, 'samassa' indicates being in the same situation or location, which is expressed as 'in the same'.
He istuvat samassa huoneessa.
They sit in the same room.
In this context, 'samassa' refers to sharing an identical or common subject, specifically a train, indicating 'on the same'.
Olimme samassa junassa eilen.
We were on the same train yesterday.
Here, 'samassa' is used to denote being part of the same group or organization, interpreted as 'in the same'.