occur: [16] Etymologically, occur means ‘run towards’. It was borrowed from Latin occurrere, a compound verb formed from the prefix ob- ‘towards’ and currere ‘run’ (source of English course, current, etc). This had the sense ‘run to meet’, hence simply ‘meet’, which survived into English: ‘The whole multitude might freely move … with very little occurring or interfering’, Richard Bentley, Boyle Lectures 1692. But ‘meeting’ also passed into ‘presenting itself’, ‘appearing’, and hence ‘happening’ – from which the main present-day meaning of English occur comes. => course, current
occur (v.)
1520s, "meet, meet in argument," from Middle French occurrer "happen unexpectedly" or directly from Latin occurrere "run to meet, run against, befall, present itself," from ob "against, toward" (see ob-) + currere "to run" (see current (adj.)). Sense development is from "meet" to "present itself" to "appear" to "happen" ("present itself in the course of events"). Meaning "to come into one's mind" is from 1620s. Related: Occurred; occurring.
例文
1. If these drugs are stopped abruptly then some withdrawal symptoms may occur .
これらの薬を突然服用停止すると、いくつかの停止症状が現れる可能性がある。
2.Keep a pad handy to jot down queries as they occur .
手元にメモ帳を置いて、問題があるときはいつでもメモできるようにします。
3.Nitrates are chemicals that occur naturally in water and the soil.
硝酸塩は水と土壌中に自然に存在する化学物質である。
4.Emergency cooling systems could fail and a reactor meltdown could occur .
緊急冷却システムが機能しなくなり、原子炉で炉心溶融が発生する可能性がある。
5.Unless you respect other people 's religions，horrible mistakes and conflict will occur .