inflate
US /ɪnˈfleɪt/
UK /ɪnˈfleɪt/

1.
膨脹
to make something increase in size by filling it with air, or to increase in size when filled with air:
:
•
He inflated the balloons with helium.
膨脹
to make something increase in size by filling it with air, or to increase in size when filled with air: