Incessant (adjective)

1. Continuing without interruption; incessant.
2. Being without cessation; unending.
3. Being uninterrupted in time; unceasing.

Origin:

From the latin word "incessans" meaning "unceasing" or "continuing without interruption".

Examples:

1. The incessant chatter of the children was causing a headache.
2. The incessant rain made it impossible to go outside.
3. The incessant noise of the construction work made it hard to concentrate.
4. His incessant complaints were getting on everyone's nerves.
5. The dog's incessant barking was driving the neighbors crazy.