wagtail
wag·tail
noun
Origin
From a partial suppletion of Middle English wagstert (literally “wag-tail”), equivalent to wag + tail.
Related words
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Parts
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.