Stiffen
"Stiffen" in German
aufdoppeln
(to make stiff)
aussteifen
(to make stiff)
ertüchtigen
(to make stiff)
versteifen
(to make stiff)
versteifen
(to become stiff)
verstärken
(to make stiff)
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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.