fiduciary

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Merriam-Webster's Word of the Day

2026-01-27

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Merriam-Webster's Word of the Day for January 27, 2026 is: fiduciary • fuh-DOO-shee-air-ee  • adjective Fiduciary is a formal word describing something relating to or involving trust, such as the trust between a customer and a professional. // The bank's fiduciary obligations are clearly stated in the contract. See the entry > Examples: "Banks and brokerage firms hold a fiduciary responsibility to protect their customers, including from scams." — Carter Pape, American Banker, 11 Aug. 2025 Did you know? Fiduciary relationships are often of the financial variety, but the word fiduciary does not, in and of itself, suggest pecuniary ("money-related") matters. Rather, fiduciary applies to any situation in which one person justifiably places confidence and trust in someone else, and seeks that person's help or advice in some matter. The attorney-client relationship is a fiduciary one, for example, because the client trusts the attorney to act in the best interest of the client at all times. Fiduciary can also be used as a noun referring to the person who acts in a fiduciary capacity, and fiduciarily or fiducially can be called upon if you are in need of an adverb. The words are all faithful to their origin: Latin fīdere, which means "to trust."
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  • It's the Word of the Day podcast for January 27th.

  • Today's word is fiduciary, also pronounced fiduciary and spelled F-I-D-U-C-I-A-R-Y.

  • Fiduciary is an adjective.

  • It's a formal word describing something relating to or involving trust,

  • such as the trust between a customer and a professional.

  • Here's the word used in a sentence from American banker.

  • Banks and brokerage firms hold a fiduciary responsibility to protect their customers,

  • including from scams.

  • Fiduciary relationships are often of the financial variety.

  • But the word fiduciary does not, in and of itself, suggest pecuniary or money-related matters.

  • Rather,

  • fiduciary applies to any situation in which one person justifiably places confidence and trust in someone else,

  • and seeks that person's help or advice in some matter.

  • The attorney-client relationship is a fiduciary one, for example,

  • because the client trusts the attorney to act in the best interest of the client at all times.

  • Fiduciary can also be used as a noun, referring to the person who acts in a fiduciary capacity,

  • and fiduciarily or fiducially can be called upon if you need an adverb.

  • The words are all faithful to their origin, the Latin Fidere, which means to trust.

  • With your word of the day, I'm Peter Sokolowski.