An imperfection of character
The man could tolerate his companion's foible because it was covered by his many admirable qualities.
The minor foible in the woman's character made her unsuitable for the career she really wanted.
The foible is the part right under the tip.
Everything in between the forte and foible is the Center of Percussion.
In order to foible those who are learning the difference between a real and fake handbag, some faux manufacturers have begun to stitch their lining.