unmanned

• 指车辆、航天器或设备在运行时不搭载操作人员或乘员。

Describes a vehicle, spacecraft, or device that operates without a human crew on board.

1. Without crew or personnelB2formal

   Describes a vehicle, spacecraft, or system that operates without a human crew on board.

   无人

   • The unmanned drone flew over the disaster area to assess damage.
   • NASA launched an unmanned spacecraft to explore Mars.
   • Unmanned aerial vehicles are used for surveillance and mapping.

   同义词pilotlessrobotic

   反义词mannedoccupied

2. Without staff or operatorsB2formal

   Describes a facility, station, or location that is not staffed by people.

   无人值守的

   • The border crossing is unmanned during the night hours.
   • The lighthouse has been unmanned since the automation was installed.
   • The remote weather station is completely unmanned.

   同义词unattended

   反义词manned

• 使人失去勇气、信心或自制力；使变得软弱、胆怯或不知所措。

A verb meaning to deprive of manly qualities, courage, or strength; to cause to lose composure or self-control.

1. Cause to lose courage or confidenceC2formalbritish

   To make someone feel weak, frightened, or less confident, often in a way that undermines their resolve.

   使丧失勇气

   • The harsh criticism completely unmanned him.
   • The sight of the battlefield unmanned even the bravest soldiers.
   • Her sudden outburst unmanned him, leaving him speechless.

   同义词dauntdemoralizediscouragedisheartenenervateintimidateunnerve

   反义词emboldenencouragefortifyinspiritnerve