This is the 2219th most frequent German word.
einzel
"Einzel" means "single" or "individual" in English.
Here 'Einzelbestandteil' uses 'einzel' as a prefix to denote a singular component within a larger entity.
Jeder individuelle Beitrag ist ein wertvoller Einzelbestandteil des Ganzen.
Every individual contribution is a valuable single component of the whole.
In the word 'Einzelheiten', 'einzel' implies specific details or aspects rather than a general overview.
Diese Einzelheiten müssen noch besprochen werden.
These details still need to be discussed.
The word 'einzelnen' is used here to specify one item singly, as opposed to multiple items.