Definition of unpanniered in US English:
unpanniered
adjective
rare
Not laden with a pannier or panniers; (of a skirt, dress, etc.) not having panniers.
Origin
Early 19th century. From un- + panniered. In some uses probably influenced by un-.
Pronunciation
unpanniered
/(ˌ)ʌnˈpanɪəd/