important task; heavy responsibility; major mission
Refers to a significant duty or mission, often with a formal or weighty connotation. Used in professional, organizational, or solemn personal contexts.
He was entrusted with an important task by the company president.
The success of this project is your heavy responsibility.
Compound of 大 (great, important) and 任 (duty, responsibility). The exact historical derivation is uncertain, but the kanji combination directly conveys the meaning of a significant responsibility.