pulsion
/ˈpʌlʃn/noun
1The action or an act of driving or pushing. Now rare.
2 Psychoanalysis. An unconscious drive or impulse influencing the development of human personality.
Origin
Early 17th century; earliest use found in Thomas Walkington (c1575–1621), Church of England clergyman and author. From French pulsion action of pushing and its etymon post-classical Latin pulsion-, pulsio action of beating or striking in battle, action of driving out from classical Latin puls-, past participial stem of pellere to drive, push + -iō. Compare Italian pulsione.