This is the 11135th most frequent Catalan word.
suposava
"Suposava" means "supposed" or "assumed" in English (past tense).
In this sentence, 'suposava' is used to refer to an existing condition, implying 'involved' or 'entailed' within a context of responsibility.
Ahir van dir que suposava una gran responsabilitat.
Yesterday they said it involved a great responsibility.
Here, 'suposava' conveys the implication of requiring or involving calculations as part of an activity.
L'exercici suposava fer molts càlculs.
The exercise required doing many calculations.
In this case, 'suposava' is used as 'assumed' to indicate a presumption or prediction about someone's actions.