Definition of freethinker. : a person who thinks freely or independently : one who forms opinions on the basis of reason independently of authority; especially : one who rejects or is skeptical of religious dogma.
Even though most German speakers may understand what you mean when you say beamer instead of projector, native English speakers will typically be completely lost. * Evidence for the use of the word beamer for BMW cars and motorbikes can be found in the Oxford English Dictionary, see here. An alternative spelling is beemer. Moreover, as explained here, BMW enthusiasts use beamer/beemer for cars and beamer for motorbikes. (Thanks to Eric for the link.)
joist-beam used to support floors or roofs. beam-long thick piece of wood or metal or concrete, etc., used in construction. floor joist-joist that supports a floor. trimmer joist, trimmer-joist that receives the end of a header in floor or roof framing in order to leave an opening for a staircase or chimney etc.