gropes , groping , groped
If you grope for something that you cannot see, you try to find it by moving your hands around in order to feel it.
With his left hand he groped for the knob, turned it, and pulled the door open.
他左手摸索到门把手,转动一下,然后把门拉开。
If you grope your way to a place, you move there, holding your hands in front of you and feeling the way because you cannot see anything.
I didn't turn on the light, but groped my way across the room.
我没有开灯,而是摸黑穿过了房间。
If you grope for something, for example the solution to a problem, you try to think of it, when you have no real idea what it could be.
He groped for solutions to his problems.
他在寻找问题的解决办法。