unbearable (adj.) unbar (v.) unbalanced (adj.) unbalance (v.) unawares (adv.) unaware (adj.) unavoidable (adj.) unavailing (adj.) unavailable (adj.) unavailability (n.) unauthorized (adj.) unattractive (adj.) unattested (adj.) unattended (adj.) unattainable (adj.) unattached (adj.) unassuming (adj.) unassisted (adj.) unassimilated (adj.) unassailable (adj.)