soothing

Het was repetitief, maar rustgevend.

(transitive) To restore to ease, comfort, or tranquility; relieve; calm; quiet; refresh.
(transitive) To allay; assuage; mitigate; soften.
(rare, transitive) To smooth over; render less obnoxious.
(transitive) To calm or placate someone or some situation.
(transitive) To ease or relieve pain or suffering.
(intransitive) To temporise by assent, concession, flattery, or cajolery.
(intransitive) To bring comfort or relief.
(transitive) To keep in good humour; wheedle; cajole; flatter.
(obsolete, transitive) To prove true; verify; confirm as true.
(obsolete, transitive) To confirm the statements of; maintain the truthfulness of (a person); bear out.
(obsolete, transitive) To assent to; yield to; humour by agreement or concession.