achieving maximum productivity with minimum wasted effort or expense.

action or process of replacing person or thing.

(of shooting) carried out to protect exposed person from enemy. thing used to protect, decorate, or conceal something else. To form a layer over something so it is hidden.

look closely at or examine.

programs and other operating information used by computer.

Long hole dug in the ground, e.g. to move water. To direct energy or feelings into something.

Making a good sounding but misleading argument. To make someone more worldly and experienced.

at fast speed.

arrange to receive something regularly by paying in advance.

That is likely to happen or be true.

flowing naturally or supplied to building through pipes and taps. action or movement of runner. (Of a road) to go from one place to another.

Being uninteresting and taking a long time; boring.

general view, examination, or description of person or thing. Acts of measuring lands or properties to make a map. To measure an area of land to make a map of it.

Explanation of how something works (e.g. product).

striving to achieve or attain something in face of difficulty or resistance. To try very hard to do something difficult.