[1825–35; ‹ LL sānātōrius healthful, equiv. to L sānā(re) to heal (deriv. of sānussane) + -tōrius-tory1]This word is first recorded in the period 1825–35. Other words that entered Englishat around the same time include: breakdown, cross section, panda, self-help, structural-tory is a suffix occurring in loanwords from Latin, orig. adjectival derivatives of agentnouns ending in -tor (predatory); also forming adjectival derivatives directly from verbs (obligatory; transitory)