unmanned

From un- +‎ manned.

• IPA^(key): /ʌnˈmænd/
• Rhymes: -ænd

unmanned (not comparable)

1. not operated by a person or a crew
   • 2013 June 7, Ed Pilkington, “‘Killer robots’ should be banned in advance, UN told”, in The Guardian Weekly, volume 188, number 26, page 6:

     In his submission to the UN, [Christof] Heyns points to the experience of drones. Unmanned aerial vehicles were intended initially only for surveillance, and their use for offensive purposes was prohibited, yet once strategists realised their perceived advantages as a means of carrying out targeted killings, all objections were swept out of the way.

   an automated e-mail message sent from an unmanned mailbox

• (of a vehicle: not operated by a person or crew): crewless

• manned
• crewed

• remote-controlled
• unstaffed
• uncrewed

unmanned

1. simple past tense and past participle of unman