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unbidden

American  
[uhn-bid-n] / ʌnˈbɪd n /
Sometimes unbid

adjective

  1. not ordered or commanded; spontaneous.

  2. not asked or summoned; uninvited.

unbidden British  
/ ʌnˈbɪdən /

adjective

  1. not ordered or commanded; voluntary or spontaneous

  2. not invited or asked

"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 unbidden

before 1050; Middle English unbiden, Old English unbēden. See un- 1, bidden

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.