unforgettable
Word family
- forgetverbA2
- forgetfuladjectiveB2
- forgettableadjectiveB2
- unforgettablyadverbB2
- forgetfulnessnounC1
Synonym discussion
Sense: adjective/1
All three words describe something that stays in your mind, but they differ in strength and tone. 'Memorable' is the most general and neutral — a memorable speech or party that you enjoyed. 'Unforgettable' is stronger, implying a deep emotional impact that actively resists being forgotten. 'Indelible' is more formal and literal; it originally meant a mark that cannot be erased, so it suits lasting impressions such as an indelible image or an indelible effect. 'Haunting' carries a slightly sad or eerie tone — a haunting melody or a haunting memory suggests something beautiful but also painful. If you simply enjoyed a film, say it was memorable, not unforgettable. If a scene stayed with you for years with emotional weight, unforgettable fits best.
Common collocations
Adverbs
Phrases
- for all the right reasons
- in every way
Etymology
Formed from the prefix un- (meaning 'not'), the verb forget (from Old English forgietan, 'to lose memory of'), and the suffix -able (meaning 'able to be', from Latin -abilis via French). The word has been used in English since the early 1600s.