regular

regular 规则的，惯常的

来自拉丁语 regula,规则，来自 regere,管理，统治，来自 PIE*reg,拉直，词源同 correct,right,regal.

regular

regular: [14] Regular ‘according to a rule’ is the most instantly recognizable English descendant of Latin rēgula ‘rule’ (others include rail ‘bar’ and rule). It goes back ultimately to the same Indo-European base as produced Latin regere ‘rule’ (source of English rector, regent, etc) and rēx ‘king’ (source of English regal, royal, etc). From it was derived the late Latin verb rēgulāre, which has given English regulate [17], and may also lie behind rile ‘annoy’ [19], a variant of an earlier roil which was possibly imported via Old French ruiler ‘mix mortar’.
=> rector, regent, regulate, rile, rule

regular (adj.)

late 14c., from Old French reguler "ecclesiastical" (Modern French régulier), from Late Latin regularis "containing rules for guidance," from Latin regula "rule," from PIE *reg- "move in a straight line" (see regal).

Earliest sense was of religious orders (the opposite of secular). Extended from late 16c. to shapes, etc., that followed predictable or uniform patterns; sense of "normal" is from 1630s; meaning "real, genuine" is from 1821. Old English borrowed Latin regula and nativized it as regol "rule, regulation, canon, law, standard, pattern;" hence regolsticca "ruler" (instrument); regollic (adj.) "canonical, regular."

regular (n.)

c. 1400, "member of a religious order," from regular (adj.). Sense of "soldier of a standing army" is from 1756. Meaning "regular customer" is from 1852; meaning "leaded gasoline" is from 1978.

1. Check the oil at regular intervals, and have the car serviced regularly.

定期检查汽油，并对车辆进行定期维护。

2. He is being constantly monitored with regular checks on his blood pressure.

他被实时监测，定时量血压。

3. George struggled wildly, going under and resurfacing at regular intervals.

乔治疯狂地挣扎，不断在水面上浮浮沉沉。

4. She also writes a regular column for the Times Educational Supplement.

她也定期为《泰晤士报高等教育增刊》写专栏文章。

5. Make a point of backing up your files at regular intervals.

一定要定期备份文件。

【ordinary, typical, regular, normal, natural】
这组词都有“规则的，正常的，正规的”的意思，其区别是：
ordinary: 强调一般性和普通性，含不突出的意味。
typical: 指个体能体现出群体的特征。
regular: 指已有模式、有规律或定期的。
normal: 指不超过某种限度、符合某种标准或常规。
natural: 侧重某人或某物的行为符合其固有特性。

【usual, habitual, regular, conventional, customary】
这组词都有“通常的，惯常的”的意思，其区别是：
usual: 普通用词，概念广泛。指经常发生或意料中的事，既可指自然发生的现象，也可指按个人习惯或惯例而做的事。
habitual: 指按个人习惯反复发生的事情。侧重经常性、习惯性。
regular: 着重遵守约定俗成的规则。
conventional: 语气强，指遵守已成习惯的事情，强调符合惯例，由人们普遍认可。
customary: 指特定的个人或群体的平常习惯，或习俗性的行为。