| BIR | a pen that has a small metal ball as the point of transfer of ink to paper |
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| BIR | sound of something in rapid motion |
| BIR | the basic unit of money in Ethiopia |
| BIR | make a soft swishing sound, as of a motor working or wings flapping |
| BIR | the event of being born |
| BIR | the process of giving birth |
| BIR | the kinship relation of an offspring to the parents |
| BIR | the time when something begins (especially life) |
| BIR | give birth (to a newborn) |
| BIR | a passage in the uterus and vagina through which a fetus passes during vaginal birth |
| BIR | a copy of the official document giving details of a person's birth |
| BIR | limiting the number of children born |