Þæt word ""oferswefn"" is geworht of þǣm geþōhte þæt sēo byrdness is gesibb swefne, ac on witunge is hit hīere þonne swefn, oþþe ""ofer"" swefne. Hit is fram þǣm worde ""hynosis"" (þe is fram ""neuro-hypnosis"", wordlīce ""(fēlend)-seonu-swefn"", fram þǣm Scotiscan lǣce Jamese Braide ymb 1841 gemacod) selfe ēðod; þæt word ""hypnosis"" self is efne gebrocen on þǣm mǣstum dǣle ōðerra sprǣca. James self scēop his weorc on þǣm geforðod fram Franze Mesmere and his folgiendum (""Mesmerscipe"" oþþe ""dēora blōmtēong"" ), ac he ne gelīefde swā swā Franz ymb þǣre wīsan be þǣre þe sēo endebyrdness worhte.