Wedge

any shape that is triangular in cross section

a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments)

a diacritical mark (an inverted circumflex) placed above certain letters (such as the letter c) to indicate pronunciation

a heel that is an extension of the sole of the shoe

(golf) an iron with considerable loft and a broad sole

something solid that is usable as an inclined plane (shaped like a V) that can be pushed between two things to separate them

a block of wood used to prevent the sliding or rolling of a heavy object

put, fix, force, or implant

squeeze like a wedge into a tight space