The glen was so tranquil that I actually heard the spider's footfalls as it approached. Now that the kids have gone to bed, it will be tranquil again in the house.The church was so tranquil.
The girl sat on the tranquil beach and relaxed.
Example sentence - Our home will not be tranquil until his daughter moves out for ever.
The yoga room was very tranquil.
The teacher told her students before the test to be tranquil.