Used as a noun meaning 'agreement' or 'affirmative', often in formal or written contexts such as voting or decision-making.
The motion was passed with everyone's agreement.
Interjection used to express agreement or consent, similar to 'aye' or 'yes'. Often used in formal settings like roll calls or votes.
When the teacher called his name, he answered "Aye."
"Those in favor, please say aye." "Aye."
うん is a very casual affirmative used among friends, while 応 sounds blunter and more old-fashioned, often used by men in formal or fictional settings.
correspondence; equivalence · suitability; matching; being appropriate · dealing with; handling; response · compatibility; support
aid; assistance; help; support; reinforcement · cheering; rooting (for); support
more or less; roughly; pretty much; technically · tentatively; for the time being · just in case; to be on the safe side · once
application; applying; volunteering · entry; contest application; raffle application
answer; respond; meet · satisfy; accept; comply with
The kanji 応 means 'respond' or 'agree'. The reading おう is the on'yomi, and the word is used as a single-character noun/interjection in formal contexts. The exact historical derivation as a standalone word is uncertain.
respond; comply; accept; satisfy; apply for
emergency; first-aid; temporary
fight back; return fire; counter-attack; accept a challenge
dealing with people; attending to visitors; handling inquiries
hailing each other; calling out to one another · acting in concert; responding; sympathizing · agreement; concord
exchange; give-and-take · reply; retort; reciprocation
stress
compliance; conformance; adaptation · immediate response; rapid reaction
yes or no; agreement or refusal
receiving visitors; dealing with visitors; reception
retribution; just deserts; karma
bid; tender; submission of a bid
refractory; unresponsive
secret understanding; collusion; betrayal
arhat; one worthy of offerings
according to one's means; appropriate to one's position; reasonable share
manifestation in a suitable form
applied chemistry · adaptation
responding to a call-up for military service; answering a call-up
Buddhist begging bowl
appropriate response; expedient action