This is the 4620th most frequent Japanese word.
戦う
"戦う" means "to fight" or "to battle."
In this context, '戦う' ('tatakau') represents a struggle or confrontation against a challenge, in this case, a health issue.
彼女は病気と戦っている。
She is fighting against her illness.
Here, '戦う' ('tatakau') is metaphorically used to describe efforts or strategic actions in a competitive business environment.
その会社は競争の中で戦う必要がある。
That company needs to fight in the competition.
Here, '戦う' ('tatakau') is used to denote physical combat or conflict between individuals or groups.