May force (5)
I believe the answer is:
might
I believe this is a double definition.
'may' is the first definition.
('might' can be a synonym of 'may')
'force' is the second definition.
(thesaurus)
(Other definitions for might that I've seen before include "Capability" , "What functions as an auxiliary" , "- - and main" , "Clout" , "is not unlikely to" .)