unmarried
Word family
Synonym discussion
Sense: adjective/1
'Unmarried' is the most neutral and formal term for someone without a spouse. 'Single' is far more common in daily conversation and can mean either not married or not in a romantic relationship — a person can be single but dating, or single and not looking. 'Unwed' is rare in contemporary English, reserved mostly for legal documents or historical discussion (e.g., 'unwed mother'). 'Bachelor' applies only to men and carries a slightly informal, often positive tone about an independent lifestyle. In practice, use 'single' when chatting about personal life, 'unmarried' when filling out official forms or writing demographic reports, and avoid 'unwed' unless the context is formal or historical.
Common collocations
Etymology
Formed in English by adding the prefix 'un-' (meaning 'not') to 'married'. The word 'married' comes from Old French 'marier' (to marry), which traces back to Latin 'maritare' (to wed), from 'maritus' (husband).