tapoihin

Tapoihin is the illative plural form of the Finnish noun tapa, meaning a habit, manner, or custom. The illative case expresses movement toward or into something, so tapoihin is used when referring to entering or adopting habits or routines (for example, into new habits or reverting to old habits).

It is commonly used in expressions about changing behavior and everyday routines. Typical collocations include uusiin tapoihin (into new habits) and vanhoihin tapoihin (into old habits). Verbs that govern the illative, such as palata (to return) or omaksua (to adopt), can pair with tapoihin to specify the habitual target. Example: Monet palaavat vanhoihin tapoihin stressaavina aikoina.

Etymology and related forms: tapoihin is formed from the base tapa with the illative plural suffix -ihin. The related forms include tavat (habits, manners) in the nominative plural and tapakulttuuri (behavior culture) as a broader concept related to habitual conduct. The word is widely used in everyday Finnish to discuss personal routines, customs, and behavioral change.