friedlich
peaceful
Without conflict, violence, or war; characterized by peace and harmony.
Die Demonstration für den Klimaschutz verlief vollkommen friedlich.
The demonstration for climate protection was completely peaceful.

peaceful
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peaceful
Without conflict, violence, or war; characterized by peace and harmony.
Die Demonstration für den Klimaschutz verlief vollkommen friedlich.
The demonstration for climate protection was completely peaceful.

The adjective 'friedlich' (peaceful) is derived directly from the noun 'der Frieden' (peace). It describes a state or quality characterized by peace.
Nach dem Streit herrschte eine friedliche Stimmung im Raum.
After the argument, there was a peaceful mood in the room.
The exact meaning of 'friedlich' (peaceful) depends strongly on the noun it describes. A 'friedliche Demonstration' (peaceful demonstration) is nonviolent, a 'friedlicher Abend' (peaceful evening) is calm and relaxed, and a 'friedlicher Hund' (peaceful dog) is not aggressive.
Wir saßen auf der Terrasse und genossen die friedliche Abendstimmung.
We sat on the terrace and enjoyed the peaceful evening atmosphere.
In the context of politics and social conflicts, 'friedlich' (peaceful) is often combined with words like 'Lösung' (solution), 'Protest' (protest), 'Revolution' (revolution), or 'Zusammenleben' (coexistence) to emphasize the absence of violence.
Die beiden Länder streben eine friedliche Lösung ihres Grenzkonflikts an.
The two countries are seeking a peaceful solution to their border conflict.
In connection with death, 'friedlich' (peaceful) is used to express that someone died calmly and without pain or struggle. A very common phrase is 'friedlich einschlafen' (to pass away peacefully).
Nach einem langen Leben ist er im Kreise seiner Familie friedlich eingeschlafen.
After a long life, he passed away peacefully surrounded by his family.
quiet / calm
'ruhig' and 'friedlich' can both describe a relaxed situation. 'ruhig' mainly says that there is little noise, little movement, or little excitement. It can also describe a calm person. 'friedlich' emphasizes more strongly that there is no conflict, violence, or aggression. That is why 'friedlich' fits well with people, animals, demonstrations, or a harmonious mood. Learners may confuse the words because a peaceful situation is often also quiet or calm. But not everything that is 'ruhig' is automatically 'friedlich'.

Die Demonstration blieb friedlich, obwohl viele Menschen auf dem Platz waren.
The demonstration remained peaceful, even though there were many people in the square.
Am Sonntagmorgen ist es in unserer Straße sehr ruhig.
On Sunday morning, our street is very quiet.