1. unscrewing - Noun
2. unscrewing - Verb
unscrewing
present participle of unscrew
unscrewing (plural unscrewings)
The act by which something is unscrewed.
Waterman remained the market leader until the early 1920s. citation At this time, fountain pens were almost all filled by unscrewing a portion of the hollow barrel or holder and inserting the ink by means of an eyedropper—a slow and messy procedure. Source: Internet
This was achieved by unscrewing the spike (a feature of all Pickelhauben regardless of whether they bore a plume) and replacing it with a tall metal plume-holder known as a trichter. Source: Internet