regain
verb [ T ]
uk/rɪˈɡeɪn/ usto take or get possession of something again:
regain a level/presence/share ABM is struggling to regain its market share.
The company needs to regain control of its finances.
regain (lost) ground
to begin to be strong or successful again after a period of difficulty:
On the Nasdaq, technology stocks struggled to regain ground after Wednesday's sell-off.