flex

1. Flexibility, pliancy. (uncountable)
2. An act of flexing. (countable)
3. A flexible insulated electrical cord. (countable)
4. Flexible ductwork, typically flexible plastic over a metal wire coil to shape a tube. (uncountable)
5. A point of inflection. (countable)
6. An act or instance of flaunting something; a boast or brag; something considered impressive. (countable, slang)

الجمع flexes