adrift

形容词 adrift:

1. aimlessly drifting
   同义词：afloat, aimless, directionless, planless, rudderless, undirected
2. afloat on the surface of a body of water

副词 adrift:

1. floating freely; not anchored
2. off course, wandering aimlessly

1. The top of your pen is going adrift and will soon fall.
   你的笔帽松了，很快就要掉了。
2. She untied the rope and set the boat adrift.
   她把绳索解开，放开小船。