This is the 1064th most frequent Japanese word.
戦い
"Battle" or "fight."
Here, 戦い (tatakai) is used to refer to a literal armed conflict between parties.
激しい戦いが続いています。
A fierce battle is ongoing.
In this case, 戦い (tatakai) is used metaphorically to describe a personal struggle or challenge.
受験は自分との戦いです。
Taking an exam is a battle against oneself.
Here, 戦い (tatakai) is used to describe a figurative combat, such as a hearty debate or dispute.