Concessive adverb 'dessen ungeachtet' (regardless of this)

dessen ungeachtet means regardless of this / notwithstanding this. It is an elevated concessive adverbial that picks up a previously mentioned circumstance with the genitive pronoun dessen ("of this") and negates its expected effect with ungeachtet ("disregarded").

Functionally it is an adverbial connector, so heading a clause it triggers subject-verb inversion:

• Die Warnungen waren deutlich; dessen ungeachtet handelte er. - The warnings were clear; regardless of this, he acted.
• Der Markt brach ein; dessen ungeachtet hielt die Firma an der Strategie fest. - The market collapsed; notwithstanding this, the company kept to its strategy.
• Alle rieten ab. Dessen ungeachtet unterschrieb sie den Vertrag. - Everyone advised against it. Regardless of this, she signed the contract.

Note the related preposition ungeachtet, which governs the genitive: ungeachtet aller Bedenken (regardless of all reservations).

Common mistakes:

• Writing dem ungeachtet (dative) - the fixed form uses the genitive dessen.
• Forgetting the inversion (not dessen ungeachtet er handelte, but dessen ungeachtet handelte er).
• Mixing the adverb up with the genitive preposition: as an adverb it stands alone and refers back; as a preposition it needs a genitive noun.

'dessen ungeachtet' (regardless of this) links clauses with inversion.

Means 'regardless of this'; causes inversion.

'dessen ungeachtet' verbindet Sätze mit Inversion.