responder
responder — noun
1. a person whose job is to provide help in dangerous or emergency situations, such
a person whose job is to provide help in dangerous or emergency situations, such as a police officer, firefighter, or paramedic — for example, the personnel who arrive at the scene of a car accident, a fire, or a natural disaster.
When the apartment building caught fire, over forty responders arrived within minutes.
quantifier + plural 'responders' for a team
Christopher works as a first responder for the Chicago fire department.
compound: first responder
Emergency responders helped families escape from the flooded streets before sunrise.
Arjun trains new responders how to stay calm during dangerous rescue missions.
The hospital needs more trained responders for natural disasters like earthquakes.
- first responder
more specific — refers to the first trained professionals arriving at the scene (police, paramedics, firefighters)
- rescue worker
broader — can include volunteers and search teams, not necessarily the first to arrive
- emergency worker
nearly synonymous but slightly more general; includes hospital emergency room staff who may not go to the scene
文法句型
first responder
emergency responder + verb (arrive / help / rescue)
responder + at / on + [location]
用法筆記
Often used in the compound noun 'first responder', which describes a person with special training who is among the first people to arrive at an accident or emergency. The plural 'responders' is very common when referring to organised response teams (police, fire, medical services working together).
常見錯誤
2. a person who gives an answer, reply, or reaction to a question, message, or situ
a person who gives an answer, reply, or reaction to a question, message, or situation — someone who responds verbally or in writing.
I sent a message to the group chat, but only one responder replied so far.
Camila posted a question in the online forum, and three responders replied within five minutes.
scenario: forum posting with multiple responders in a reply context
Eve is always a quick responder when her colleagues send her urgent emails.
The talk-show host asked a difficult question and waited for a responder in the audience.
A slow responder can cause delays in a fast-moving project like software development.
- respondent
more formal; preferred in legal, research, and official contexts
- answerer
very rare in modern English; use 'responder' or 'respondent' instead
- replier
informal and less common; 'responder' is the standard choice
文法句型
responder + to + [question / message / email]
adjective + responder (quick / slow / first)
用法筆記
Less formal than 'respondent'. This sense is common in everyday workplace communication (emails, meetings, chat groups). The pattern 'first responder to + [question/topic]' is particularly frequent in meeting contexts but is distinct from the compound 'first responder' in sense 1.
常見錯誤
3. a person who answers questions in a survey, questionnaire, or research study — s
a person who answers questions in a survey, questionnaire, or research study — someone whose responses are collected and analysed by researchers.
The survey had over two thousand responders, most of whom were university students.
quantifier + survey + responders
Each responder in the study answered a set of questions about their daily eating habits.
pattern: responder + in + [study]
Trang was one of the responders selected for a follow-up interview by the research team.
Researchers promised each responder that their answers would remain completely private.
After only forty residents responded to the city's housing survey, the low number of responders made the results unreliable.
- respondent
the standard formal term in social science research and legal contexts
- participant
broader — includes people who take part in experiments, not just surveys
- interviewee
specific to face-to-face or telephone interview settings
文法句型
survey responder
responder + in + [study / survey / poll]
responder + to + [questionnaire]
用法筆記
In formal research writing, 'respondent' is more common than 'responder'. However, 'responder' appears frequently in spoken research contexts, data reports, and informal academic discussion. The preposition 'in' (not 'of') is used: 'responders in the study'.
常見錯誤
4. a patient whose medical condition improves as a result of a specific treatment,
a patient whose medical condition improves as a result of a specific treatment, drug, or therapy — for example, a cancer patient whose tumour shrinks after chemotherapy, or a person whose blood pressure drops after taking medication.
About sixty percent of patients were good responders to the new cancer drug.
pattern: good/poor responder + to + [treatment]
Doctors classified Henry as a responder because his symptoms improved after six weeks of treatment.
verb: classify + as + a responder
The lung cancer trial compared responders and non-responders to find out why the new drug worked for some patients.
Benjamin improved only slightly after eight weeks on antidepressants, so doctors classed him as a slow responder.
In the diabetes trial, scientists examined blood markers to predict which patients would be responders to the new drug.
- respondent
not used in this medical sense; 'respondent' is legal/research, not clinical
- good responder
specifies that the response was strong or complete
- partial responder
indicates that improvement was present but limited
- non-responder
a patient who does not improve with the given treatment
文法句型
responder + to + [treatment / drug / therapy]
good responder / poor responder
用法筆記
Primarily used in medical research and clinical contexts. The term is often paired with its opposite 'non-responder'. The preposition 'to' is required before the treatment: 'a responder to the vaccine'. In everyday hospital conversation, doctors may say 'he responded well' rather than 'he was a responder'.