unscrew
Word family
Synonym discussion
Sense: verb/1
All four words relate to releasing or removing something, but 'unscrew' is the only one that specifically involves a screw thread. 'Twist off' is very close in meaning and often interchangeable when talking about bottle caps or jar lids, but it is more informal and does not work for light bulbs or threaded nozzles. 'Loosen' suggests making something less tight rather than fully removing it — you can loosen a jar lid and still be unable to open it. 'Open' is the broadest term and works for any container regardless of its fastening mechanism; saying 'open the jar' does not tell the listener how to do it. 'Untwist' reverses a twisting motion but is rarely used for threaded fasteners — it sounds more natural for rope or fabric. For example: 'She unscrewed the lid with one firm twist' is precise, while 'She opened the jar' leaves the method unclear.
Common collocations
Etymology
Formed in English around the early 1600s by adding the prefix 'un-' (meaning 'reverse the action of') to the verb 'screw', which itself came from Old French 'escroue' meaning a threaded fastener or a nut. The original sense was simply 'to draw a screw from its place', and the meaning later broadened to include any twisting removal, such as taking the lid off a jar.