The word slowly is an adverb; it describes a verb. Example use:
I walked slowly into the classroom hoping that no one would notice I was late.
The aircraft descended through the clouds
The vampire slowly extended its fangs before sinking them into the victim's neck.
The diver experienced a sense of emersion as they slowly rose to the surface of the water.
The snail moved slowly across the garden path.
The sentence "she walked slowly to her seat" is in the past tense.
i slowly ascented the ladder
He chews his food really slowly.
The burgular slowly crept up the stairs.
The dinosaur ate his prey slowly.
The sail boat moved slowly, propelled by the zephyr.
A pot of tea steeped slowly by the fire.
The teeth will slowly decay if you do not brush your teeth.
After ten years my childhood memories slowly evanesced.
I spoke slowly and clearly so that I would not be misunderstood.
The opening curtain slowly reveals the stage.
The queue of people slowly snaked its way around the block.
Elderly nannies were perambulating slowly down the street.