Unexpectedly
The Century Dictionary and Cyclopedia
In an unexpected manner; at a time or in a manner not expected or looked for; suddenly.
Wiktionary, Creative Commons Attribution/Share-Alike License
adverb.
In an
unexpected
manner.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adverb.
in a way that was not expected
adverb.
without advance planning
Word Usage
"He had come into his title unexpectedly, and made his new tenantry adore him."