freundlich
friendly
Showing pleasant, courteous, and kind behavior toward other people.
Der neue Kollege ist sehr freundlich und hilfsbereit.
The new colleague is very friendly and helpful.

friendly
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friendly
Showing pleasant, courteous, and kind behavior toward other people.
Der neue Kollege ist sehr freundlich und hilfsbereit.
The new colleague is very friendly and helpful.

The adjective 'freundlich' (friendly) is made up of the noun 'Freund' (friend) and the ending '-lich' (-ly/-like). So it literally means 'like a friend' or 'in the manner of a friend'.
Er hat eine sehr freundliche Art, mit Menschen zu sprechen.
He has a very friendly way of speaking with people.
To express who the friendly behavior is directed toward, the preposition 'zu' with the dative is often used. The structure is: 'freundlich zu jemandem sein' (to be friendly to someone).
Die Lehrerin ist immer freundlich zu den Schülern.
The teacher is always friendly to the students.
When 'freundlich' (friendly) describes a person, it refers to their character. If it describes a place, objects, or the weather, however, it means 'pleasant', 'bright', or 'inviting'.
Das Zimmer wirkt durch die hellen Farben sehr freundlich.
The room feels very bright and inviting because of the light colors.
The phrase 'Mit freundlichen Grüßen' (Kind regards) is the standard closing phrase at the end of formal letters and emails. In quick digital communication, it is sometimes abbreviated as 'MfG'.
Vielen Dank für Ihre schnelle Antwort. Mit freundlichen Grüßen, Anna Schmidt.
Thank you for your quick reply. Kind regards, Anna Schmidt.
good
'gut' and 'freundlich' can both describe positive behavior toward other people. 'gut' is broader: a good person acts decently, helpfully, or morally right. 'freundlich' describes more specifically the way someone speaks to or deals with others: nice, polite, and pleasant. If someone is friendly, you often notice it directly in contact with them. If someone is good, it can also be about their values or their actions.

Beim Termin war der Mitarbeiter freundlich und hat alles ruhig erklärt.
At the appointment, the employee was friendly and explained everything calmly.
Es war gut von dir, der Nachbarin beim Tragen zu helfen.
It was good of you to help the neighbor carry her things.