partiell
partial
Concerning only one part; partial, not complete or comprehensive.
Der Schaden am Gebäude war nur partiell, nicht das ganze Haus war betroffen.
The damage to the building was only partial; not the whole house was affected.

partial
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partial
Concerning only one part; partial, not complete or comprehensive.
Der Schaden am Gebäude war nur partiell, nicht das ganze Haus war betroffen.
The damage to the building was only partial; not the whole house was affected.

'Partiell' (partial) is related to the German word 'der Part' (part), which means 'Teil' (part) or 'Anteil' (share). This connection helps you remember the meaning 'teilweise' (partly/partially).
Jeder muss seinen Part zur Gruppenarbeit beitragen.
Everyone has to contribute their part to the group project.
The word 'partiell' (partial) is used mainly in written language, in formal contexts, or in technical language (e.g., medicine, science).
Die Zustimmung zum neuen Gesetz war nur partiell.
Approval of the new law was only partial.
Common combinations are 'partielle Sonnenfinsternis' (partial solar eclipse), 'partielle Lähmung' (partial paralysis), or 'partieller Erfolg' (partial success), meaning whenever something is not complete.
Bei einer partiellen Sonnenfinsternis ist die Sonne nur zum Teil verdeckt.
During a partial solar eclipse, the sun is only partly covered.
part
'zum Teil' and 'partiell' both mean that something is not complete or affects only one area. 'zum Teil' is very natural in everyday language and easy to understand. 'partiell' sounds more factual and is more likely to be used in formal texts, medicine, technology, or administration. In terms of meaning, they are very similar here. In normal conversations, people usually say 'zum Teil'; 'partiell' fits better when the style should be more precise or technical.

Nach dem Sturm war die Straße partiell gesperrt.
After the storm, the road was partially closed.
Paula kann den Termin zum Teil vorbereiten, aber sie braucht noch die Zahlen.
Paula can partly prepare for the appointment, but she still needs the figures.