<unk>  is a medical instruction meaning to withhold food and fluids. It is also known as nil per os <unk>  or<unk> , a Latin phrase that translates to English as<unk>  through the<unk> ". Variants include nil by<unk>  <unk> , nihil/non/nulla per os, or complete bowel rest. A liquid-only diet may also be referred to as bowel rest.<unk>  is one of the abbreviations that is not used in AMA style;<unk> " is spelled out instead.
Nothing by mouth
Freeze spray
Sterile insect technique
Hand washing
Human–animal breastfeeding
Assisted feeding
Nail biting
Dental aerosol