tätigste
Tätigste is a German word. It is the feminine superlative form of the adjective tät, which means busy or active. Therefore, tätigste translates to busiest or most active when referring to a female person or a feminine noun. For example, one might say "Sie ist die tätigste Schülerin in der Klasse" which translates to "She is the busiest student in the class."
The masculine and neuter superlative form is tätigkeiten. The comparative form for all genders is tätiger (more
The etymology of tät traces back to Old High German 'tätig', meaning active or diligent. It is