PIS

2-letter words 3

• ishave the quality of being; (copula, used with an adjective or a predicate noun)
• sia tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors
• pithe ratio of the circumference to the diameter of a circle; approximately equal to 3.14159265358979323846...