unavailable

a.不可获得的

unanimous, unanimously, unannounced, unanswerable, unanswered, unanticipated, unappreciated, unapproachable, unarmed, unarticulated, unashamed, unashamedly, unasked, unasked for, unassailable, unassuming, unassumingly, unattached, unattended, unattractive, unavailing, unavoidable, unavoidably, unaware, unawares, unbalance, unbalanced, unbar, unbearable, unbearably, unbeatable, unbeaten, unbecoming, unbelief, unbelievable, unbelievably, unbeliever, unbelieving, unbend, unbending,