Learn Dutch: De bestelling wordt onvoorwaardelijk geretourneerd.

In Dutch, the present passive voice is formed with worden plus the past participle. De bestelling wordt geretourneerd means the return is happening now or is a general rule (like a store policy). If you used is geretourneerd, it would form the present perfect passive, meaning the action is already fully completed ("has been returned").

How is the word onvoorwaardelijk constructed?

The root of the word is the noun de voorwaarde (the condition). Adding the suffix -lijk turns it into the adjective or adverb voorwaardelijk (conditional). Finally, the negative prefix on- makes it onvoorwaardelijk (unconditional or unconditionally).

Since this lesson covers phrases like wat dan ook, could I express this idea using a dan ook construction?

Yes, you could express a similar meaning using onder welke voorwaarde dan ook (under any condition whatsoever). However, the single word onvoorwaardelijk is much more concise and natural for business terms or formal return policies.

Why use geretourneerd instead of a native Dutch verb like teruggestuurd?

Retourneren is a formal loanword primarily used in business, e-commerce, and official administration. In everyday conversation, you would be much more likely to use teruggestuurd (sent back) or teruggebracht (brought back).