ob-


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ob-

 
word element [L.], against; in front of; toward.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

ob-

prefix denoting against.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in classic literature ?
The mate ob- served regretfully that he "could not account for that young fellow's whims." What prevented him telling us all about it at once, he wanted to know.