knuckle under: Idiom Meaning and Origin

What does ‘knuckle under’ mean?

The idiom knuckle under means to submit or yield to someone's authority, pressure, or demands, especially when one is in a difficult or challenging situation.

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The idiom "bend the knee" is closely related to the phrase "knuckle under." Both expressions convey the act of submitting or surrendering to authority or pressure. While "knuckle under" emphasizes the physical act of pressing one's knuckles against a surface, "bend the knee" highlights the symbolic act of bending one's knee in a gesture of submission. Both idioms carry a connotation of yielding or giving in against one's own will or desires.

Similarly, the idiom "give in" is synonymous with "knuckle under." It signifies surrendering or yielding, often in the face of opposition or pressure. Whether it's giving in to someone's demands or compromising on a decision, both phrases emphasize the act of succumbing to external forces. "Give in" and "knuckle under" demonstrate a willingness to let go of one's own position or desires in favor of someone else's.

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In addition, the idiom "cave in" shares a similar meaning to "knuckle under." It refers to yielding or surrendering under pressure or adversity. The imagery evoked by "cave in" suggests the collapsing or crumbling of a structure, symbolizing a loss of resistance or resilience. "Cave in" and "knuckle under" both depict a sense of giving way or giving up in the face of overwhelming circumstances.

Furthermore, the idiom "knuckle down" is related to "knuckle under" but conveys a different nuance. While "knuckle under" implies submission or surrender, "knuckle down" emphasizes the act of applying oneself diligently or focusing one's efforts. It suggests a commitment to hard work or serious task completion, often in the face of challenges or distractions. "Knuckle down" and "knuckle under" both involve a sense of determination, albeit in different contexts.

Lastly, the idiom "bow down" shares similarities with "knuckle under" in terms of submissive behavior. Both phrases involve yielding or surrendering to authority, although "bow down" specifically refers to the act of bowing as a sign of respect or reverence. The act of bowing down acknowledges someone's superior position or power and demonstrates deference or obeisance. "Bow down" and "knuckle under" both portray an act of submission or deference to a higher authority or power.

It's important to note that these related idioms, including "bend the knee," "give in," "cave in," "knuckle down," and "bow down," are all expressions of submission or surrender in different contexts. While they may have different origins and imagery, they share a common theme of yielding to external authority or pressure.

Example usage

Examples of how the idiom "knuckle under" can be used in a sentence:

  1. She refused to knuckle under to the pressure and stood her ground.
  2. The team decided to knuckle under and accept the coach's decision, even if they disagreed.
  3. After a long argument with her parents, Sarah finally knuckled under and agreed to their rules.

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