bumpy

[buhm-pee]
adjective, bumpier, bumpiest.
1.
of uneven surface; full of bumps: a bumpy road.
2.
full of jolts: a bumpy ride.
3.
causing jolts: Bumpy air shook the airplane.
4.
having many difficulties or failures; full of ups and downs: He had a rather bumpy career before he settled down in his present job.

Origin:
1860–65; bump + -y1

bumpily, adverb
bumpiness, noun
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
bumpy (ˈbʌmpɪ)
 
adj , bumpier, bumpiest
1.  having an uneven surface: a bumpy road
2.  full of jolts; rough: a bumpy flight
 
'bumpily
 
adv
 
'bumpiness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

bumpy
1865, from bump + -y (2).
"Fasten your seatbelts. It's going to be a bumpy night." - Bette Davis [Margo Channing], "All About Eve," 1950.
Related: Bumpiness.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
The round ends of the nucleus are bumpy and rough, indicating material is
  loosely aggregated there.
Scorpions protect their bodies with bumpy, grooved exoskeletons.
It can be a long, bumpy, wet ride home when the weather turns nasty.
Trips in these cars were often long and bumpy, making it extremely
  uncomfortable for those left standing.
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