Flaw:

• an imperfection, mark or blemish
• a mistake or shortcoming in something that makes it invalid, causes it to fail, or reduces its effectiveness
• a fault or weakness in a person’s character.

Floor:

• the lower surface of a room
• a storey of a building (rooms or areas on the same level)
• a flat bottom surface
• a minimum limit or level
• the part of a legislative hall in which members sit and debate is conducted
• the large central hall where trading takes place in a Stock Exchange
• to provide a room/area with a floor (or as an adjective e.g. ‘a marble-floored room’)
• to have the right to speak in a debate or discussion – ‘have the floor’
• to disconcert, baffle or defeat; to knock someone to the ground.