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flightless

[flahyt-lis] /ˈflaɪt lɪs/
adjective
1.
incapable of flying:
flightless birds such as the moa, rhea, and dodo.
Origin of flightless
1870-1875
First recorded in 1870-75; flight1 + -less
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Based on the Random House Dictionary, © Random House, Inc. 2018.
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British Dictionary definitions for flightless

flightless

/ˈflaɪtlɪs/
adjective
1.
(of certain birds and insects) unable to fly See also ratite
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
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Word Origin and History for flightless
adj.

1875, from flight (n.1) + -less.

Online Etymology Dictionary, © 2010 Douglas Harper
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