sim
シム
解説 Definition
Sim は、携帯電話などで利用者情報を扱う SIM（加入者識別モジュール）を指す名詞です。日本語の「シム」と同じく通信端末のカードや機能を指しますが、英語では通常 SIM と大文字で書かれます。
A SIM is a small card or embedded digital module that stores information used to identify a subscriber to a mobile network. It enables a phone, tablet, or other device to connect to cellular services associated with that subscriber.
覚え方のコツ Memory Tip
この語義では通常 SIM と大文字で書き、Subscriber Identity Module の頭文字だと覚えます。携帯回線の「契約者を識別する小型モジュール」で、insert a SIM、buy a new SIM、data SIM などと使います。物理カードだけでなく eSIM の機能も含みます。小文字 sim は simulation の略にもなり得るため、通信の文脈と大文字表記が手掛かりです。
Treat SIM as three meaningful initials: Subscriber Identity Module. A subscriber has a mobile service agreement, identity tells the network which customer is connecting, and module refers to the small component that carries the necessary information. Picture inserting a SIM before switching on a phone, buying a travel SIM, or activating an eSIM. In this telecommunications sense, the term is normally written in capital letters. Lowercase “sim” can informally shorten “simulation,” so capitalization and a context involving phones, tablets, data plans, or mobile networks help identify the intended meaning.
例文
Please insert the Sim before turning on the phone.
電話の電源を入れる前にシムを挿入してください。
This tablet works with a data Sim.
このタブレットはデータ用シムで動作します。
He bought a new Sim for his trip abroad.
彼は海外旅行のために新しいシムを買いました。
sim の類義語・関連語
sim の語源・成り立ち Etymology
Subscriber Identity Module の頭文字語。subscriber はラテン語 subscribere（下に書く：sub- 下 + scribere 書く）に由来し、契約者の意。scribe（書記）や subscription（購読）と同根。携帯回線の加入者情報を記録する小型カードを指す。
SIM is an initialism formed from Subscriber Identity Module. Subscriber ultimately comes through Latin subscribere, literally associated with writing beneath or signing, and later developed the sense of a person enrolled for a service. Identity refers to the information that distinguishes the customer, while module describes the compact functional unit. The term first referred especially to a removable card, but current usage also includes embedded forms such as the eSIM.
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