the upper, weak part of the blade Foil: a fencing weapon with rectangular cross-section blade and a small bell guard; any sword that has been buttoned to render it less dangerous for practice
A foible is a habit or characteristic that someone has which is considered rather strange, foolish, or bad but which is also considered unimportant. human foibles and weaknesses. = quirk. a small weakness or strange habit that someone has, which does not harm anyone else = peculiarity (Early modern , from feble; FEEBLE)