There are multiple definitions - click on the translation that matches your context.

abrir mão de

verbo

full

relinquish

verb

Definitions of relinquish

to give up something such as a claim, a responsibility, a position, an advantage, a benefit or your power etc, especially when you are unwilling to do so (=you do not want to)

Al Fahim said he was willing to relinquish full control in the event of a suitable offer.