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adiaphorous

American  
[ad-ee-af-er-uhs] / ˌæd iˈæf ər əs /

adjective

  1. doing neither good nor harm, as a medicine.

adiaphorous British  
/ ˌædɪˈæfərəs /

adjective

  1. med having no effect for good or ill, as a drug or placebo

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of adiaphorous

1625–35, for earlier sense; < Greek adiáphoros, equivalent to a- a- 6 + diáphoros different ( dia- dia- + -phoros -phorous )

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.