eu > en 
1 da/du ad. to heat (up), to warm (up)
olioa berotu eta tipulak gehitu: heat the oil and add the onions
zatoz aurrera sutondoan berotzera: come in and warm yourself by the fire
2 du ad. [biziagotu, gartu] to excite; to stimulate; to anger
3 du ad. [jipoitu] to beat sb up, to hit sb, to give sb a beating, to strike
4 da ad. to work up, to get worked up, to get enthusiastic/excited; to become/get angry
berotu, bero(tu), berotzen