"sostener en equilibrio" in English

to maintain- to support- to hold up- to keep up- to outstand- to argue- to contend- to hold- to hold- to hold- to prop up- to shore up- to submit- to sustain- to sustain- to underpin- to bear- to uphold- to back up- to have- to keep

Jan

at- in- into- on- on- on- on- with- as- by

balance- equilibrium- scale- footing- equipoise