incessant
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incessant
Continuing without interruption or pause; constant and ongoing.
Der unaufhörliche Lärm von der Baustelle machte es unmöglich, sich zu konzentrieren.
The incessant noise from the construction site made it impossible to concentrate.
The word is built logically: the prefix 'un-' negates the verb 'aufhören' (to stop). The ending '-lich' makes it an adjective. 'Unaufhörlich' (incessant) therefore literally means 'not stopping'.
Der unaufhörliche Regen dauerte drei Tage lang.
The incessant rain lasted for three days.
'Unaufhörlich' (incessantly) is very often used as an adverb to describe a verb. It usually comes directly after the conjugated verb or in the middle field of the sentence.
Das Baby weinte unaufhörlich die ganze Nacht.
The baby cried incessantly all night.
This word often describes negative or neutral, ongoing phenomena. Typical combinations are 'unaufhörlicher Lärm' (incessant noise), 'unaufhörlicher Regen' (incessant rain), or verbs such as 'unaufhörlich fließen' (to flow incessantly) and 'unaufhörlich klagen' (to complain incessantly).
Sein unaufhörliches Klagen über die Arbeit nervt die Kollegen.
His incessant complaining about work annoys his colleagues.
'Unaufhörlich' (incessant/incessantly) belongs more to written language or an elevated style. It often sounds somewhat more formal or dramatic.
Die Glocken läuteten unaufhörlich zum Gedenken an die Opfer.
The bells rang incessantly in memory of the victims.
constant
'ständig' and 'unaufhörlich' both mean that something lasts for a long time or does not really stop. 'ständig' is the normal everyday word and can also mean that something happens again very often. 'unaufhörlich' is stronger: it means that something really continues without a pause, for example rain, noise, or pain. It often sounds more intense and somewhat more formal than 'ständig'. For frequent repetition, you usually use 'ständig'. For something that continues nonstop, 'unaufhörlich' fits especially well.
Im Büro klingelt das Telefon heute unaufhörlich, deshalb kommt meine Schwester kaum zur Ruhe.
The phone in the office is ringing incessantly today, so my sister can hardly get any peace.
Du bekommst im Krankenhaus ständig neue Termine für Untersuchungen.
At the hospital, you constantly get new appointments for examinations.