sound

verb:to seem a certain way
- I didn't sound condescending, right?
noun:vibrations that travel through the air and are heard by the ear
- That strange sound came from the basement.
- The sound of birds woke me up.
- She enjoys the calming sound of ocean waves.
- He turned up the volume to hear the sound better.
adjective:not broken or damaged; in good condition
- The building appears to be structurally sound.
adjective:showing or based on good judgment
- That’s a sound investment for the future.
- He gave a sound explanation for his decision.