e.g.
The parents became accessory to the murder, when they helped their son escape the country.
....the fatter she gets, the sadder you became ....and you do not say anything about it, and so you are an accessory to her ill-health. You are accessorial to her ill-health.
ac·ces·so·ry (ăk-sĕs′ə-rē)
n. pl. ac·ces·so·ries
- a. A subordinate or supplementary item; an adjunct.
- b. Something nonessential but desirable that contributes to an effect or result. See Synonyms at attachment.
- Law - One who knowingly assists a lawbreaker in the commission of a crime but does not actually participate in that crime.
adj.
- Having a secondary, supplementary, or subordinate function.
- Law - Involving the knowing assistance of a lawbreaker in the commission of a crime without actual participation in the crime.
[Middle English accessorie, from Medieval Latin accessōrius, from accessor, helper, from Latin accessus, approach; see access.]
ac′ces·so′ri·al (-sə-sôr′ē-əl) adj.
ac·ces′so·ri·ly adv.
Usage Note: Although the pronunciation (ə-sĕs′ə-rē), with no (k) sound in the first syllable, is sometimes heard, it is not accepted by a majority of the Usage Panel. In the 1997 survey, 87 percent of the Panelists disapproved of it. The 2012 survey showed an 80 percent disapproval rate.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Synonyms:
accessory
noun
- A subordinate element added to another entity:
adjunct, appendage, appurtenance, attachment, supplement.
- One who assists a lawbreaker in a wrongful or criminal act:
accomplice, confederate, conspirator.
adjective
Giving or able to give help or support:
ancillary, assistant, auxiliary, collateral, contributory, subsidiary, supportive.
The American Heritage® Roget's Thesaurus. Copyright © 2013, 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.