overjealous
over·jea·lous
adjective
1.
suspicious or unduly suspicious or fearful of being displaced by a rival
- “a jealous lover”
Origin
From Middle English overgelous, equivalent to over- + jealous.
WordNet 2.1 (Princeton University). Wiktionary (CC BY-SA). WordNet 2.1 Copyright Princeton University. All rights reserved. Wiktionary content is available under the Creative Commons Attribution-ShareAlike Licence.