good as one's word, as

good as one's word, as idiom
Completely trustworthy, dependable, as in The boss said we could leave early on Friday and she was as good as her word. [Second half of 1500s]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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