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responsible

/rɪˈspɑːnsəbəl/

accountable for actions or their consequences

From Latin re- (back) + Latin spondere (to pledge).

adjective
re-
Latin
AI-inferred
re-
“back; again; against”; an inseparable prefix
Old French
AI-inferred
re-
Inherited as a productive prefix
Middle English
AI-inferred
re-
Borrowed into English word formation
spondere
Latin
AI-inferred
spondēre
“to pledge, promise, or guarantee”
Combined
Latin respondēre
re- + spondēre: literally something like “promise or answer back”
Latin
Verified
respons-
Past-participle stem meaning “answered, promised in return”

from Latin respons-, past-participle stem of respondere "respond, answer to, promise in return,"

Latin
Verified
*responsabilis
reconstructed
Reconstructed form meaning “answerable”; the ancestor of responsible

from Latin *responsabilis)

Old French
Verified
responsable
“answerable, accountable”

from Old French responsable, responsible, formed

Middle French
Verified
responsable
Continued French form

from Middle French responsable

English
AI-inferred
responsible
Attested from the 1640s; later also “reliable, trustworthy”
Modern English
responsible
“

A responsible person is, etymologically, someone who must answer back. Latin respondēre combined re-, “back” or “in return,” with spondēre, “to pledge”—the same promise-making family that produced sponsor. By the 1640s, English responsible meant “answerable,” especially when an action had consequences; by the 1690s, it had acquired the warmer sense “reliable” or “trustworthy.” Picture a medieval official being summoned to explain a missing payment: responsibility was not merely good behavior but the obligation to show up and give an account. The useful legal distinction survives today: responsible describes the condition of being answerable, while liable more properly describes the actual obligation after a wrong has occurred. Remember the hidden scene inside the word: to be responsible is to have made a pledge—and to be ready when the world calls for your answer.

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