atelectasis /a-te-lekˈtə-sis or a-ti-/ (medicine)

1. Incomplete inflation of a lung at birth
2. The collapse of a lung in an adult

atelectatic /-tatˈik/ adjective

• unforgettably
• unforgivable
• unforgiven
• unforgiveness
• unforgivenesses
• unforgiving
• unforgivingness
• unforgivingnesses
• unforgot
• unforgotten
• unform
• unformal
• unformalised
• unformalized
• unformatted
• unformed
• unformidable
• unforming
• unforms
• unformulated
• unforsaken
• unforthcoming
• unfortified
• unfortunate
• unfortunately