Tiukaksi
Tiukaksi is a Finnish grammatical form derived from the adjective tiukka, meaning tight or strict. In Finnish, the translative suffix -ksi marks a change of state, so tiukaksi expresses “into a tight/strict state.” It is used with verbs that denote becoming or turning into something, such as tulla or muuttua.
Usage and examples: Hänestä tuli tiukaksi. This means “He/She became strict.” Säännöt muuttuivat tiukiksi. “The rules
Nuances: tiukaksi can refer to physical tightness in a more figurative sense, or to strictness in attitudes,