予約を変更する

The phrase '予約を変更する' (yoyaku o henkō suru) is composed of several elements: * **予約 (yoyaku)**: This noun means 'reservation' or 'appointment'. Its etymology is: * **予 (yo)**: From Middle Chinese 預 (yüH), meaning 'to prepare in advance', 'to foresee'. In Japanese, it carries the sense of 'pre-'. * **約 (yaku)**: From Middle Chinese 約 (ʔjɐk), meaning 'to promise', 'to bind', 'agreement', 'contract'. In Japanese, it conveys the idea of a 'promise' or 'agreement'. * Combined, 予約 (yoyaku) literally means 'pre-arranged agreement' or 'pre-promise', leading to the meaning of 'reservation'. This compound word has been in use in Japanese for a significant period, reflecting the concept of prior arrangement. * **を (o)**: This is a grammatical particle (object marker) in Japanese, indicating the direct object of a verb. It has been a fundamental part of Japanese grammar for centuries and is of native Japanese origin. * **変更 (henkō)**: This noun means 'change', 'alteration', or 'modification'. Its etymology is: * **変 (hen)**: From Middle Chinese 變 (pjonH), meaning 'to change', 'to transform', 'unusual'. In Japanese, it denotes 'change' or 'alteration'. * **更 (kō)**: From Middle Chinese 更 (kɑŋ), meaning 'to change', 'to renew', 'further'. In Japanese, it also conveys the sense of 'change' or 'update'. * Combined, 変更 (henkō) literally means 'to change and renew' or 'to alter and update', resulting in the meaning of 'change' or 'modification'. This compound word is also a well-established term in Japanese, derived from classical Chinese. * **する (suru)**: This is an irregular verb meaning 'to do' or 'to make'. It is one of the most fundamental and frequently used verbs in Japanese. It attaches to nouns (especially *suru*-verbs or *sa-gyō* verbs, which are nouns that can be verbalized by adding *suru*) to form a verb phrase. In this case, 変更 (henkō) + する (suru) creates the verb 'to change' or 'to alter'. The verb *suru* itself has an ancient Japanese origin, tracing back to Old Japanese *se-* or *su-*, and has evolved over centuries to its modern form. Therefore, '予約を変更する' (yoyaku o henkō suru) literally translates to 'to do a change to a reservation' or 'to change a reservation'. Each component word has roots in classical Chinese, with 'を' and 'する' being fundamental elements of native Japanese grammar. The combination of these elements forms a common and essential phrase in everyday Japanese for managing appointments and bookings.