Can you figure out its meaning?
equa-/equi- = even, balanced, level, equal
anima = mind, soul
A person who evinces equanimity is "of an even mind." In plainer language-- level-headed.
Lightsaber in hand, Kenobi faced the hulking, fanged beast before him. The monster bellowed and readied itself to charge, but the Jedi was the picture of equanimity.
Or how about:
onus = burden (straight from the Latin)
onerous (same root) = burdensome
exonerate = take out from under a burden-- specifically, to remove from under the burden of guilt
Carter was exonerated when the court determined that no evidence existed to implicate him.
Make etymology work for you.