volunteering
Word family
Synonym discussion
Sense: verb/1
All four words describe making oneself available for something, but they differ in context and connotation. 'Offer' is the broadest: you can offer help, money, or an object — it does not imply unpaid work. 'Volunteer' specifically suggests unpaid effort and often a sense of personal initiative. 'Step forward' is more dramatic and informal, used when someone emerges from a group to take on a difficult task. 'Sign up' adds the idea of formally registering for an organised programme (e.g. signing up for a charity run). 'Enlist' is more formal and often military — it means to join an organised effort, not just offer help spontaneously. For everyday unpaid help, 'volunteer' is the most natural choice: 'She volunteered at the food bank every Saturday.' whereas 'She signed up at the food bank' sounds like she registered rather than actively helped.
Common collocations
Etymology
From Latin 'voluntarius' meaning 'willing, of one's own free will', via French 'volontaire'. The verb sense dates to the mid-18th century, originally used in military contexts for those who enlisted by choice rather than by conscription. The modern meaning of unpaid community service emerged in the early 20th century.