invisible
Word family
- invisiblyadverbB2
- invisibilitynounC1
- visibleadjectiveB1
- visiblyadverbB2
- visibilitynounB2
Synonym discussion
Sense: adjective/1
All four words describe something that is not visible, but they differ in how and why. 'Invisible' is the broadest term: it includes anything that cannot be seen by nature (germs, air) or by design (a camouflaged object). 'Unseen' is weaker — it means something was not seen on a particular occasion, not that it is impossible to see (e.g., 'the thief remained unseen in the shadows'). 'Hidden' implies that something has been deliberately or accidentally placed out of view, but could be seen if uncovered ('a hidden key under the doormat'). 'Imperceptible' is the most formal and technical, describing changes or differences too slight for the senses to detect ('an imperceptible shift in temperature'). For everyday use, choose 'invisible' for things that truly cannot be seen, 'hidden' for things that are covered or concealed, and 'unseen' for things that simply escape notice at a given moment.
Common collocations
Etymology
Invisible comes from Latin 'invisibilis', made up of 'in-' (not) and 'visibilis' (that can be seen). 'Visibilis' itself comes from 'videre' (to see). The word entered English through Old French in the 1300s, first used in religious texts to describe God as an invisible being.