This is the 12892nd most frequent Russian word.
легчайшей
The word "легчайшей" means "lightest" in English, as a superlative form of "легкий" (light).
The word 'легчайшей' acts as a superlative adjective indicating the highest level of easiness associated with 'задачей'.
Это была легчайшей задачей из всех.
It was the easiest task of all.
Here, 'легчайшей' serves to describe 'тропой,' emphasizing the minimal effort or difficulty involved.
Её путь к успеху был легчайшей тропой.
Her path to success was the easiest trail.
In this sentence, 'легчайшей' describes 'судьбой,' expressing metaphorical ease in one's life circumstances.