-ory Suffixes

-ory

-ory1 ,suffix. 

-ory is attached to nouns and verbs that end in -e to form adjectives with the meaning “of or relating to (the noun or verb mentioned)”:

excrete + -ory → excretory (= of or relating to excreting);

sense + -ory → sensory (= of or relating to the senses).

-ory is also attached to certain roots to form adjectives with the meaning “providing or giving”:

satisfact- + -ory → satisfactory (= giving satisfaction).

-ory2 ,suffix. 

-ory is attached to roots to form nouns that refer to places or things that hold (the root), or places that are used for (the root):

cremat- + -ory → crematory (= a place where bodies are cremated);

observat(ion) + -ory → observatory (= place where observations of the heavens are made).

WordReference Random House Unabridged Dictionary of American English © 2020

-ory ,

an adjective-forming suffix, joined to bases of Latin origin in imitation of borrowed Latin words containing the suffix  -tory1 (and its alternant -sory):

excretory;

sensory;

statutory.

  •  Latin -ōrius, extracted from -tōrius -tory1; see -or2
  •  Anglo-French; Old French -oire
  •  Middle English -orie

-ory1 ,

a suffix forming nouns denoting places or receptacles, joined to bases of Latin origin in imitation of borrowed Latin words containing the suffix  -tory2 (or its alternant -sory):

crematory.

  •  Latin -ōrium, extracted from -tōrium -tory2; see -ory1, -or2
  •  Anglo-French; Old French -oire
  •  Middle English -orie

Collins Concise English Dictionary © HarperCollins Publishers::

-ory

suffix forming nouns

  1. indicating a place for: observatory
  2. something having a specified use: directory

Etymology: via Old French -orie, from Latin -ōrium, -ōria

-ory

suffix forming adjectives

  • of or relating to; characterized by; having the effect of: contributory, promissory

Etymology: via Old French -orie, from Latin -ōrius

-ory‘ also found in these entries:

-atoryBaconian theoryBardeen-Cooper-Schrieffer theoryBohr theoryChappellDykeabattoirabbreviatoryabstinence theoryadditoryadvisoryadvocatoryaffirmatoryanovulatoryanticipatoryapplicatoryappreciatoryaspiratoryassertoryatomic theoryauteur theoryauxiliary storagebig bang theoryboudoirbubble memorycaquetoirecatastrophe theorycell theorycoherence theorycombinatorycommemoratorycommunication theorycompensatorycomputer memoryconciliatoryconclusorycondemnatoryconfiscatorycore memorycorpuscular theorycorrespondence theorycrematorydecision theorydedicatorydelegatorydenunciatorydepositorydepreciatorydiscriminatorydomino theory

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