C16: from Late Latin superērogāre to spend over and above, from Latin super- + ērogāre to pay out
supererogate in American English
(ˌsupərˈɛrəˌgeɪt)
verb intransitiveWord forms: ˌsuperˈeroˌgated or ˌsuperˈeroˌgating
Obsolete
to do more than is required or expected
Word origin
< LL supererogatus, pp. of supererogare, to pay out beyond what is expected < super- (see super-) + erogare, to pay out (after consent by the people) < e- (for ex-), out + rogare, to ask: see rogation