From Latin supererogare, from super- + erogare âpay outâ (which is e- + rogare âaskâ).
- pertaining to supererogation, or doing more than is required, especially with reference to good works in Roman Catholicism
#:*1988: âIn now you come,â she ordered, âand we make love.â That seemed supererogatory to David Jones, who, under the gaze of the painted deer, got in there and did as he was told. â Anthony Burgess, Any Old Iron
#:*2002: It is, for example, not clear whether âlove thy enemyâ is a precept or a supererogatory counsel.— David Heyd: Stanford Encyclopedia of Philosophy