unkritisch
uncritical
Accepting information, opinions, or situations without questioning or examining them.
Er übernahm die Ansichten seines Professors völlig unkritisch.
He adopted his professor's views completely uncritically.

uncritical / non-critical
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uncritical
Accepting information, opinions, or situations without questioning or examining them.
Er übernahm die Ansichten seines Professors völlig unkritisch.
He adopted his professor's views completely uncritically.

The word is made up of the prefix 'un-' and the adjective 'kritisch' (critical). The prefix 'un-' negates the base word and means 'not'. 'Unkritisch' is therefore the direct opposite of 'kritisch'.
Eine unkritische Haltung gegenüber den Medien kann gefährlich sein.
An uncritical attitude toward the media can be dangerous.
You can recognize the meaning from the context. If 'unkritisch' refers to a person or their way of thinking, it means 'not questioning anything'. In a medical or technical context, it describes a condition that is 'not dangerous' or 'stable'.
Er liest Zeitungsartikel oft sehr unkritisch.
He often reads newspaper articles very uncritically.
In the meaning of 'nicht hinterfragend' (not questioning), the word is often used with verbs of thinking and accepting. Typical combinations are 'etwas unkritisch übernehmen' (to adopt something uncritically), 'unkritisch konsumieren' (to consume uncritically), or to have an 'unkritische Haltung' (uncritical attitude).
Man sollte Informationen aus dem Internet nicht einfach unkritisch übernehmen.
One should not simply adopt information from the internet uncritically.
In the meaning of 'ungefährlich' (not dangerous), the word is almost always used in connection with 'Zustand' (condition). The fixed phrase is often 'der Zustand ist unkritisch' (the condition is non-critical).
Der Arzt teilte uns mit, dass der Zustand des Patienten stabil und unkritisch sei.
The doctor informed us that the patient's condition was stable and non-critical.
dangerous
'gefährlich' and 'unkritisch' can be opposites when 'unkritisch' means that a condition is not threatening. 'gefährlich' describes a situation with real danger or possible harm. In this sense, 'unkritisch' is often used in health, technology, or situation reports: it means that there is no serious danger at the moment. Important: 'unkritisch' also has another meaning, namely without examination or without doubt. But in relation to 'gefährlich', it refers to the harmless condition.

Nach der Untersuchung ist der Zustand des Patienten unkritisch.
After the examination, the patient's condition is non-critical.
Die Ärztin erklärt, dass hohes Fieber für kleine Kinder gefährlich sein kann.
The doctor explains that a high fever can be dangerous for small children.