foi ‧ ble /ˈfɔɪb ə l/ BrE AmE noun [countable]
[ Date: 1600-1700 ; Origin: Early modern French , from Old French feble ; ⇨ ↑ feeble ]
a small weakness or strange habit that someone has, which does not harm anyone else SYN peculiarity :
We all have our little foibles.