pausenlos
nonstop
Describes an action or state that takes place without interruption or pause. It is often used to emphasize a long, uninterrupted duration.
Seit dem Morgen regnet es pausenlos.
It has been raining nonstop since morning.

nonstop
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nonstop
Describes an action or state that takes place without interruption or pause. It is often used to emphasize a long, uninterrupted duration.
Seit dem Morgen regnet es pausenlos.
It has been raining nonstop since morning.

The word is made up of 'Pause' (pause/break) and the ending '-los' (-less), which means 'without.' So 'pausenlos' literally means 'without a pause.'
Die Kinder haben pausenlos geredet.
The children talked nonstop.
As an adverb, 'pausenlos' usually appears in the middle field of the sentence and describes the verb. For stronger emphasis, it can also stand at the beginning of the sentence; then the verb follows directly after it.
Er hat pausenlos auf sein Handy geschaut.
He kept looking at his phone nonstop.
'Pausenlos' is often combined with verbs that describe an ongoing action, sometimes one perceived as tiring or annoying. Typical examples are 'pausenlos reden' (to talk nonstop), 'pausenlos arbeiten' (to work nonstop), or 'pausenlos weinen' (to cry nonstop).
Sie musste während der Prüfungsvorbereitung pausenlos lernen.
She had to study nonstop while preparing for the exam.
constant
'ständig' and 'pausenlos' are close in meaning when something happens for a very long time or very often. 'ständig' can refer to repeated events, even if there are short breaks in between. 'pausenlos' puts stronger emphasis on something continuing without a break. It often sounds more intense and fits especially well with actions like talking, working, running, or ringing. If you only mean frequency, 'ständig' is usually appropriate. If you want to emphasize the lack of a break, 'pausenlos' is more precise.

Nach dem Training redet sie pausenlos über das Spiel.
After training, she talks nonstop about the game.
Meine Kollegin stellt vor dem Termin ständig neue Fragen.
My colleague keeps asking new questions before the appointment.