sounds like fetus which is an unborn baby... so at time of delivery a moving force(impetus) makes it easier for the mother to give birth...
impet(impact) + us : Impulsion will always have an impact (on) us
IMPETUS is the opposite of IMPEDIMENT.
concentrate on PET...we have PT (playing time) or PET periods in school thts a stimulus or a moving force (imPETus) tht encourages students to go out n play
ComPETing with US is a bit difficult for any country, as it has a strong military FORCE.
impetus: something that beat-us with force
impetus,impact on us,think like that when we go to us what would be impact on us it will encourage our process of growth.