This is the 10390th most frequent Catalan word.
prement
"Prement" in Catalan means "pressing" or "squeezing" in English.
The word 'prement' is used here as a gerund form of the verb 'premre', meaning 'pressing', to indicate the ongoing action of applying pressure on the button.
Estava prement el botó per apagar la llum.
I was pressing the button to turn off the light.
In this sentence, 'prement' is used to describe the action needed to start the machine, situated in a subordinate clause indicating the means.
La màquina es va posar en marxa prement un sol botó.
The machine started by pressing a single button.
Here, 'prement' denotes the current action Marc is performing, applying pressure to open the jar.