Their bond was unbreakable, like a steel chain.
Meaning: Their relationship was very strong and could not be easily broken.
Choice of Words: Bond is a strong connection or tie between people or things. Unbreakable means cannot be broken or destroyed. Steel is a strong, hard metal. Chain is a series of connected links used to bind or fasten something. When you put them together, the sentence means their connection was very strong and could not be easily broken.
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Related Expressions