The best way to find the name of that complicated mechanical part whose English translation you could only approximate: Google reverse image search
Here’s how to do it:
- Do a regular Google image search for an image of the object whose name you want to translate in your source language. Example: Search for “gezahnte Unterlegscheibe”.
- Right click one of the images which best shows your search object and choose “Copy image URL”.
- Paste the URL into the file browser on the Reverse Image Search page. It will upload the image for searching.
- Now Google will search for an English word that best describes your image. In this case: “serrated washer”!