unbidden

[ uhn-bid-n ]
/ ʌnˈbɪd n /

adjective

not ordered or commanded; spontaneous.
not asked or summoned; uninvited.
Sometimes un·bid.

Origin of unbidden

before 1050; Middle English unbiden, Old English unbēden. See un-1, bidden
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for unbidden

British Dictionary definitions for unbidden

unbidden
/ (ʌnˈbɪdən) /

adjective

not ordered or commanded; voluntary or spontaneous
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