at arm’s length

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at arm’s length (idiom / metaphor)
/æt ˌɑːrmz ˈleŋ(k)θ/

Meanings

• Keeping someone emotionally distant.
• Staying separate to avoid involvement or control.
• Done fairly between independent people or businesses.
• At a distance equal to a fully stretched arm. (literal)

The idiom “at arm’s length” describes keeping someone or something deliberately distant. It suggests avoiding closeness, whether physical or emotional, to prevent intimacy, familiarity, or potential trouble. People often use it when they want to maintain a safe boundary without outright rejection.

Synonyms: distant; detached; reserved; uninvolved; independent; aloof; separate.

Example Sentences

1. Kevin kept his neighbors at arm’s length because he valued his privacy.
2. After the betrayal, Laura held her former friend at arm’s length for years.
3. The contract was negotiated at arm’s length without any personal influence.
4. Rachel carried the wet paint can at arm’s length to keep her clothes clean. (literal)

Etymology and Origin

Theories About Its Roots

One common belief ties the phrase to everyday human experience. Extending an arm creates a natural barrier, pushing away anything unwanted. This simple gesture feels instinctive, so the expression grew from a physical act into a metaphor for emotional space.

Another idea points to social customs of earlier times. Proper etiquette once required keeping a respectful distance during greetings or conversations, such as when bowing or curtsying. Stepping too close was seen as rude, especially among higher classes, so the phrase captured that idea of polite separation.

Some trace it to the world of fighting, particularly boxing. A weaker fighter might hold a stronger opponent away to avoid close combat and gain an advantage. This practical strategy in the ring supposedly inspired the figurative sense of holding threats at bay.

The Country Where It Began

The idiom first took shape in England during the late 1500s and early 1600s. English writers of that era used similar expressions in their works, showing how the language of distance naturally entered everyday speech there.

Earliest Written Records

An early version appeared in Sir Philip Sidney’s The Countess of Pembroke’s Arcadia, published in 1590. The text includes the line “as who can keep him at arms end,” referring to keeping a deceptive person at a safe remove.

William Shakespeare employed a close variant a few years later. In his play As You Like It, written around 1599, a character says, “hold death awhile at arm’s end.” The idea of pushing away something dangerous already feels familiar to modern ears.

The exact wording “at arm’s length” shows up in print by 1655. In William Gurnall’s The Christian in Complete Armour, the author warns against keeping “the preacher and the Word at armes length,” meaning avoiding spiritual truth by holding it emotionally distant.

By the 1700s the phrase had settled into its modern form, “keep at arm’s length,” and spread more widely in both spoken and written English.

A Few Interesting Details

Body parts once served as handy measuring tools for all sorts of distances, and an arm’s span offered one of the most practical ones. The phrase quietly reminds us of that old habit of using our own limbs to judge space. In a lighter note, the same idea appears today when someone holds a tricky conversation or risky friendship just far enough away to stay comfortable—proving the expression still fits everyday life centuries later.

Variants

• keep someone at arm’s length
• hold someone at arm’s length
• remain at arm’s length
• deal at arm’s length
• arm’s-length relationship
• arm’s-length transaction

Body, Mathematics, Relationship, Social

Last update: May 7, 2026 12:16 AM