really
Word family
Synonym discussion
Sense: adverb/1
These four expressions all contrast appearance with truth, but they differ in use. 'Actually' is the most neutral and common in everyday speech when correcting a wrong assumption: 'He said he was busy, but actually he was just watching TV.' 'Really' (sense 1) adds a slightly stronger contrast and often introduces a whole clause: 'I thought the job would be easy, but really it was quite hard.' 'In fact' is a little more formal and typically introduces a fuller explanation: 'The plan seemed risky. In fact, it was the safest option.' 'In reality' creates the strongest contrast between perception and truth and is often used in writing: 'The town looks quiet, but in reality it has a busy nightlife.' For everyday conversation, 'actually' and 'really' are the best choices; for essays or reports, 'in fact' and 'in reality' sound more appropriate.
Common collocations
Adverbs
- really very
- quite really
Phrases
- really and truly
- oh really
- not really
Etymology
'Really' comes from the adjective 'real' (meaning 'actual' or 'genuine') plus the suffix '-ly', which turns adjectives into adverbs. The word 'real' entered English from Old French 'reel', which came from Latin 'realis', meaning 'relating to things' or 'actual'. The earliest uses of 'really' (15th century) carried the meaning 'in reality, actually'. By the 17th century, it had developed into an intensifier meaning 'very' — similar to how speakers today might say 'really big' to mean 'very big.' The one-word exclamation 'Really?' emerged in the 18th century as a conversational response showing surprise or interest.