How do you use the word "principle" in a sentence?

Here are real-life examples of using "principle": What is the principle reason for going to school? That doesn't accord with my principle.

Principle Meaning

/ˈpɹɪn.sɪ.pəl/

Definition, CEFR level B1, pronunciation, examples, and quiz.

Definition

nounA fundamental assumption or guiding belief.

nounA fundamental assumption, fundamental law or guiding belief.

Sentence Examples

What is the principle reason for going to school?

That doesn't accord with my principle.

Synonyms & Antonyms

Synonyms:

rule

Antonyms:

None

CEFR Practice Quiz

The moral ____ of treating others with respect guides his every action.

CEFR Practice Quiz (Alternate)

She refused to compromise on her ____ of honesty, even when it would have been easier to stay silent.

Word Origin & History

From Middle English principle, from Old French principe, from Latin prīncipium (“beginning, foundation”), from prīnceps (“first”). By surface analysis, prīmus (“first”) + -ceps (“catcher”); the former ultimately from Proto-Indo-European *preh₂- (“before”); see also prince.

Literary Quotations & Historical Citations

"Let us consider ‘my dog is asleep on the floor’ again. Frege thinks that this sentence can be analyzed in various different ways. Instead of treating it as expressing the application of __ is asleep on the floor to my dog, we can think of it as expressing the application of the concept my dog is asleep on __ to the object the floor (see Frege 1919). Frege recognizes what is now a commonplace in the logical analysis of natural language. We can attribute more than one logical form to a single sentence. Let us call this the principle of multiple analyses. Frege does not claim that the principle always holds, but as we shall see, modern type theory does claim this." — 2011 July 20, Edwin Mares, “Propositional Functions”, in The Stanford Encyclopedia of Philosophy, archived from the original on 15 Dec 2012:

"Mr. Genachowski proposed codifying the new principles with four existing principles issued several years ago by the F.C.C. They say that network operators cannot prevent users from accessing lawful Internet content, applications and services of their choice, nor can they prohibit users from attaching nonharmful devices to the network." — 2009 September 22, Reuters, “F.C.C. Calls Open Internet Rules Vital”, in The New York Times, archived from the original on 09 Nov 2020:

"Lavinia—shrewd, careless, clever; ready to meet any difficulty, however humiliating, that might occur; utterly without principle; confident in that good fortune, which she scrupled at no means of attaining—was the very type of the real." — 1837, L[etitia] E[lizabeth] L[andon], “The Author and the Actress”, in Ethel Churchill: Or, The Two Brides. […], volume III, London: Henry Colburn, […], →OCLC, page 105:

"Some poems, echoing the purpose of early poetic treatises on scientific principles, attempt to elucidate the mathematical concepts that underlie prime numbers. Others play with primes’ cultural associations. Still others derive their structure from mathematical patterns involving primes." — 2013 July-August, Sarah Glaz, “Ode to Prime Numbers”, in American Scientist, volume 101, number 4:

"Cathartine is the bitter, purgative principle of senna." — 1845, William Gregory, Outlines of Chemistry:

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