To make something Finnish in character, language, or culture; to adopt or assimilate Finnish practices or identity.
From Finnic (relating to Finland) plus the verb-forming suffix '-ize' (to cause to become). Emerged in the 20th century in historical and cultural contexts discussing national identity and assimilation.
During nation-building in the 1800s, many countries deliberately 'finnicized' their territories by replacing Swedish (the former ruling language) with Finnish in schools and government—language can literally reshape a country's identity!
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