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com·pul·so·ry

compulsory

 
 
pronunciation:
km puhl s ri
features:
Word Parts
part of speech: adjective
definition: required or necessary.
This test is compulsory for graduation.
synonyms:
required
antonyms:
optional
similar words:
involuntary, necessary
derivations: compulsorily (adv.), compulsoriness (n.)
Word Parts  About this feature
The word compulsory contains the following parts:
com- Latin prefix that means with, together
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The prefix com- attaches to Latin bases beginning with m, p, or b. It has multiple forms, as the m' sound in com- assimilates to the initial sound of the base to which it is attached. See the assimilated forms col-, con-, cor-, and co-. Note: com- is frequently an intensive prefix, as in "commemorate " and "command ."
synonyms:
syn-
 
pel, puls Latin root that means drive, push
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-ory, -atory2 Latin adjective-forming suffix that means serving to, pertaining to
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The suffix -ory , -atory2 attaches to Latin verb roots to form adjectives. Adjectives ending in "-atory " tend to have corresponding verbs ending in "-ate" (congratulatory: congratulate).