Qualität. Quality. Latin qualitas, how something has been made, a characteristic; how crafted; the sum or totality of characteristics; the level of workmanship.
Beschaffenheit. The outer, inner, material, make-up of something.
Tüftler. Tinkerer. Someone who with patience and stamina can work on a complex problem; a kind of inventor; a person who finds new ways to solve a difficult problem.
Ingenieur. Latin ingenium, an ingenious person, inventive, complex thinker; to create, produce; one trained at a university.
Dem Ingenieur ist nichts zu schwör! For the engineer is nothing too difficult, with Ingenieur and schwör rhyming, from the Engineer‘s Song by Hinrich Seidel, a German engineer and novelist of the 19th Century.
The text of the song contiues: Dem Ingenieur ist nichts zu schwere – Er lacht und spricht, geht dieses nicht, so geht doch das! For the engineer is nothing is too difficult. He laughs and claims: It this doesn‘t work, then that will!
Wo man ihm ein Rätsel schenkt, steht der Ingenieur und denkt. When he‘s given a problem, the engineer stands still and ponders, with schenkt (to give) and denkt (to think) rhyming. Engineers are tinkerers. They‘ll work on something until they find an acceptable solution.