pledge
UK: plɛdʒ | US: plɛdʒ
n. a solemn promise or agreement
vt. to formally promise or give as security
n. something given as a guarantee (e.g., collateral)
The word "pledge" traces back to medieval legal and social customs, where tangible items or oaths were exchanged to bind agreements. The Old French plege reflected the concept of securing a promise, while the Germanic root plehan emphasized the act of commitment. Over time, "pledge" evolved to encompass both physical collateral (e.g., a pawned item) and abstract vows (e.g., loyalty oaths).
He made a pledge to donate part of his income to charity.
The couple exchanged wedding pledges under the oak tree.
She used her necklace as a pledge for the loan.
Students recited the honor pledge before the exam.
The government pledged to reduce carbon emissions by 2030.