| birch | (verb) whip with a birch twig | - |
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| bird | (verb) watch and study birds in their natural habitat | Synonyms: birdwatch |
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| birdie | (verb) shoot in one stroke under par | - |
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| birdlime | (verb) spread birdlime on branches to catch birds | Synonyms: lime |
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| birdnest | (verb) gather birdnests | Synonyms: bird-nest |
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| birdwatch | (verb) watch and study birds in their natural habitat | Synonyms: bird |
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| birl | (verb) cause to spin | Synonyms: spin, twirl, whirl |
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| (verb) cause a floating log to rotate by treading | Synonyms: birle |
| birle | (verb) cause a floating log to rotate by treading | Synonyms: birl |
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| birr | (verb) make a soft swishing sound | Synonyms: purr, whir, whirr, whiz, whizz |
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| birth | (verb) cause to be born | Synonyms: bear, deliver, give birth, have |
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