they serve is incorrectly written and it should be written as "bullen" being its meaning:
I guess that will mean " bullen " It would be the 3rd person plural of the present indicative form of the verb to budge that persons or things can be said but it always means movement. This word reminds me of a saying of ready in the province of Zamora, which says: "In March it bustles garlic; in April again it to budge; and in May with sayo ": with what you want to say that you can dig or move the ground where are planted garlic to remove the weeds or air them until may; in may it is better not to touch them because was " they aborrajan " they dry. Comes from the Latin noun bulla bullae which means bubble of water and also a good luck charm that children and adolescents Roman patricians were put to the neck.