gump ‧ tion /ˈɡʌmpʃ ə n/ BrE AmE noun [uncountable]
[ Date: 1700-1800 ; Origin: Perhaps from gome 'attention' (13-19 centuries) , from Old Norse gaumr ]
the ability and determination to decide what needs to be done and to do it:
At least she had the gumption to phone me.