caus-

(Latin: cause, reason, purpose; judicial process, lawsuit)

causativeness
cause
causeless
causelessly
causelessness
Et docere et rerum exquirere causas.
To teach and to inquire into the nature of things.

Motto of the University of Georgia, Athens, Georgia, USA.

excusable (adjective)
excusableness
excusably
excuse
Fac et excusa.
Do it and make excuses later.

Also, "Make your move." This is a motto for those who want to be a success in life.

Felix qui potuit rerum cognoscere causas.
Fortunate is he who has been able to learn the causes of things.

From Georglcs by Virgil who may have been praising the superior intelligence of those who can comprehend the secrets of nature and, as a result, avoid dependence on superstition to explain natural phenomena.

inexcusable
inexcusableness
inexcusably