a. Furnished with an arbor; lined with trees. “An arboreal walk.” Pollok. [ 1913 Webster ]
a. [ Pref. un- not + harbored. ] 1. Having no harbor or shelter; unprotected. [ 1913 Webster ]
2. Affording no harbor or shelter. “Unharbored heaths.” [ Obs. ] Milton. [ 1913 Webster ]