can ‧ ti ‧ le ‧ ver /ˈkæntəliːvə, ˈkæntɪliːvə $ -tl-iːvər/ BrE AmE noun [countable]
[ Date: 1600-1700 ; Origin: Perhaps from ⇨ ↑ cant 1 (3) + lever ]
a long piece of metal or wood that sticks out from an upright post or wall and supports a shelf, the end of a bridge etc
—cantilevered adjective :
a cantilevered staircase