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adj. 1. Firmly loyal or constant; unswerving. See Synonyms at faithful. 2. Fixed or unchanging: "my steadfast rule of not repeating anything in dance that I've done before" (Fred Astaire). 3. Fixed or unmovable: steadfast boulders in the stream. [Middle English stedefast, from Old English stedefæst : stede, place; see STEAD + fæst, fixed, fast; see past- in the Appendix of Indo-European roots.] steadfast′ly adv. steadfast′ness n. |
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