She fiddled with a key-safe hanging on the front doorknob, then opened the door.

I wiped off a few shiny fixtures with a towel, did the same for the front doorknob, and called it a day.

"We had better try the front doorknob," she said tightly.

The exception is the red thread, which is tied to the front doorknob of the guest's house to ward off bad luck.

He'd twist the front doorknob to see if it was unlocked, then walk around and try the back door.

He reached for the front doorknob.

His hand touched the front doorknob, then released it.

After pushing the black button he waited with his hand on the front doorknob for the buzzer to let him in.

His fingers found the front doorknob.

My hand reached out for the front doorknob.