reply
Word family
- repliernounC1
Synonym discussion
Sense: verb/1
All four words describe giving a response, but they differ in formality and grammar. 'Answer' is the most common and flexible: you can answer a question, a phone, or a person directly ('answer the teacher'). 'Reply' requires 'to' before the person or thing ('reply to the teacher') and is slightly more formal. 'Respond' is the most formal of the three and is preferred in official, medical, or academic writing ('Patients responded well to the treatment'). 'Write back' and 'get back to' are informal phrasal verbs: 'Write back' is limited to letters and messages, while 'get back to' is used for delaying a full reply ('I'll get back to you tomorrow'). For everyday answering, 'answer' is your safest choice; for formal correspondence, use 'respond' or 'reply'.
Common collocations
Etymology
From Latin 'replicare' (to fold back), via Old French 'replier'. The 'fold back' image originally described turning a written message back to the sender; by the 1500s it had broadened to any spoken or written answer.