QI

qi(1)

期 = set period of time

This character is a combination of the character 其 = qi(2) = his / her, and the character 月 = yue(4) = moon

星期 = xing(1) qi(1) = week

期刊 = qi(1) kan(1) = magazine, periodical

qi(2)

奇 = rare, special

奇怪 qi(2)guai(4) = funny

qi(3)

qi(4)

气 = gas, air

力气 = li(4)qi(-) = physical strength

力 = force, power

If a person is tired, he or she may say:

我没有力气. = Wo(3) mei(2) you(3) li(4) qi(-). = I have no energy.

*****

器材 = qi(4)cai(2) = equipment and material (used on shop signs)

计算器 = ji(4)suan(4)qi(4) = calculator, computer

Also:

计算机 = ji(4)suan(4)ji(1) = calculator, computer