From the given options, classify the following word as a noun, verb, adjective, or adverb.
Word: Cautiously
Cautiously is an adverb.
Complete the following task based on the instruction and optional input provided.### Instruction:
From the given options, classify the following word as a noun, verb, adjective, or adverb.
Word: Cautiously

### Output:
Cautiously is an adverb.