| downstairs | (adverb) on a floor below | Synonyms: below, down the stairs, on a lower floor |
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| feetfirst | (adverb) with the feet foremost | - |
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| first | (adverb) before anything else | Synonyms: first of all, first off, firstly, foremost |
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| (adverb) prominently forward | Synonyms: foremost |
| (adverb) the initial time | - |
| (adverb) before another in time, space, or importance | - |
| firsthand | (adverb) from the original source; directly | Synonyms: at first hand |
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| firstly | (adverb) before anything else | Synonyms: first, first of all, first off, foremost |
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| headfirst | (adverb) with the head before the body | Synonyms: headlong |
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| thirstily | (adverb) in a thirsty manner | - |
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| (adverb) with eagerness; in an eager manner | Synonyms: eagerly |
| upstairs | (adverb) on a floor above | Synonyms: on a higher floor, up the stairs |
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| (adverb) with respect to the mind | - |