force; strength
ability to exert influence on others; authority; power
force
(colloquial) electricity
series of means used to force someone to do something; violence
strong capacity for action of something; intensity
muscular energy; robustness
spiritual, mental or psychological energy; courage
cause; reason
set of troops, ships, planes or elements of two or more of these combat assets, intended to carry out a policing or combat mission
(informal) hernia

Used to wish someone the strength to persevere through whatever hardship they are experiencing, or to encourage someone to do something.