unbelievable

a.不可信的，无法相信的

unassuming, unassumingly, unattached, unattended, unattractive, unavailable, unavailing, unavoidable, unavoidably, unaware, unawares, unbalance, unbalanced, unbar, unbearable, unbearably, unbeatable, unbeaten, unbecoming, unbelief, unbelievably, unbeliever, unbelieving, unbend, unbending, unbiased, unbidden, unbind, unblemished, unblushing, unblushingly, unborn, unbounded, unbowed, unbreakable, unbridled, unbroken, unbuckle, unburden, unbusinesslike,