"inept" = without skill or aptitude.
"inept" = the opposite of "ept"
so, to be "inept" is to be lacking eptitude, to act with no eptivity....
"his actions showed a serious lack of eptivity, and created a bad first impression."
"She continuously proves to all that she is the opposite of ept in every way, including relationships and interpersonal communication."
In other news, a story from Anthony DeMello I recently came across that speaks to me on so many levels:
"The Master was exceedingly gracious to university dons who visited him, but he would never reply to their questions or be drawn into their theological speculations. To his disciples, who marveled at this, he said, 'Can one talk about the ocean to a frog in a well--or about the divine to people who are restricted by their concepts?' "