سم

سُمّ \ poison: dangerous matter (chemical, from bad food, from certain plants, etc.) that can harm or kill a person or living thing, etc.: rat poison. \ See Also دَسَّ السُمّ \ سُمّ الجلد (ج مَسَامّ)‏ \ pore: a very small opening in the skin, through which liquid (esp. sweat) passes.