Supervision is watching over work to see that it is done properly. Close supervision, under supervision, without supervision.
Under supervision is the standard phrase for anything a person may not yet do alone — a trainee, a learner driver, a child near water. In social work, therapy and medicine, supervision is a formal regular session in which a practitioner discusses their cases with a senior colleague, and it is required rather than optional. Note supervisor, supervise; and that supervision is legally significant, because a duty to supervise is a duty of care.
1nounsupervisionWatching over work to see it is done properly.
“Young children must not swim without adult supervision.”
supervision is an overseeing.
Latin supervisio is super, over, plus videre, to see — seeing over. The same videre gives vision, evident and provide, and supervision is looking over somebody's shoulder with the Latin visible.
Latin
supervisiō
English, today
supervision
From Latin supervisiō.
Etymology from Wiktionary, CC BY-SA