a system of words, letters, or symbols that you use instead of ordinary writing, so that the information can only be understood by someone else who knows the system
code
15
carefully and thoroughly planned
well thought out
15
a sudden clear understanding of something
insight
15
he first form that a new design of a car, machine etc has, or a model of it used to test the design before it is produced
pro‧to‧type
15
a small, useful, and cleverly-designed machine or tool
gadget
15
unorthodox opinions or methods are different from what is usual or accepted by most people
un‧or‧tho‧dox
15
someone who studies a subject in detail in order to discover new facts or test new ideas