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regular

/ˈrɛɡjələr/

following a consistent, customary, or predictable pattern

From Latin regul- (rule).

adjective
noun
adverb
regul-
Proto-Indo-European
Verified
*h₃reǵ-
reconstructed
“move in a straight line”; reconstructed ancestor

from Proto-Indo-European *h₃reǵ- (“move in a straight line”).

Latin
Verified
regula
“rule; straight piece of wood,” including a measuring stick or ruler

from Latin regula "rule, straight piece of wood" (from PIE root *reg- "move in a straight line"). The classical -a- was...

Late Latin
Verified
regularis
“containing rules for guidance”

from Late Latin regularis "containing rules for guidance,"

Middle English
Verified
reguler
Borrowed through Anglo-Norman and Middle French; originally “belonging to a religious or monastic rule”

from Middle English reguler

Modern English
regular
“

Picture an ancient Roman carpenter laying a straight wooden strip across a board: that piece of wood was a regula, a physical standard for deciding what counted as straight. The same image became metaphorical in Late Latin regularis, “guided by rules,” and then entered medieval English through the language of monasteries, where a regular person followed a religious rule rather than living as a secular outsider. By the late sixteenth century, the word had escaped the cloister and begun describing predictable shapes, actions, and habits. Its relatives still preserve the carpenter’s measuring-stick idea: to regulate is to bring something into line, while a ruler can be either the person who governs or the tool that checks straightness. Today, slang can make regular mean dull or unexciting—and in skateboarding, “regular” identifies a left-foot-forward stance—so one straight Roman line has wandered into monasteries, grammar, chicken restaurants, and skate parks.

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