This is the 9252nd most frequent Japanese word.
申し込む
To apply or to sign up.
In this sentence, '申し込む' conveys the action of reserving accommodations or services, emphasizing initiating the arrangement.
旅行のために宿泊施設を申し込む必要があります。
I need to make a reservation for accommodation for the trip.
Here, '申し込む' refers to registering or signing up for an opportunity, indicating the essential first step for participation.
試験を受けるには、まず申し込みをしてください。
To take the exam, please register first.
Here, '申し込む' is used to mean 'apply for' or 'enroll in', typically concerning participation in an organized event or service.