The phrase "arms length" refers to keeping a distance or detachment from a particular situation or person. Its antonyms are words that denote closeness, familiarity, or intimacy. Some antonyms include "close," "connected," "attached," "intimate," "familiar," and "friendly." These words indicate a level of emotional or physical proximity that is the opposite of the distance implied by "arms length." Using these antonyms in place of "arms length" can completely change the tone of a sentence or conversation, conveying a greater degree of warmth, trust, and connection. In contrast, using "arms length" or its synonym "detached" can suggest a lack of trust or unwillingness to become involved.