continual (adj.)youdaoicibaDictYouDict
early 14c., continuell, from Old French continuel (12c.), from Latin continuus (see continue). That which is continual is that which is either always going on or recurs at short intervals and never comes to an end; that which is continuous is that in which there is no break between the beginning and the end. Related: Continually (c. 1300, contynuelliche).
continuance (n.)youdaoicibaDictYouDict
mid-14c., "a keeping up, a going on," from Old French continuance (13c.), from continuer (see continue).
continuation (n.)youdaoicibaDictYouDict
late 14c., from Old French continuation (13c.), or directly from Latin continuationem (nominative continuatio), noun of action from continuat-, past participle stem of continuare (see continue).
discontinuance (n.)youdaoicibaDictYouDict
late 14c., from Anglo-French, from Old French discontinuer (see discontinue).