Scrabble?! FUNDAMENTAL

Definitions of FUNDAMENTAL in various dictionaries:

noun - any factor that could be considered important to the understanding of a particular business

noun - the lowest tone of a harmonic series

adj - serving as an essential component

adj - being or involving basic facts or principles

adj - far-reaching and thoroughgoing in effect especially on the nature of something

Of or relating to the foundation or base; elementary: the fundamental laws of the universe.

Forming or serving as an essential component of a system or structure; central: an example that was fundamental to the argument.

Of great significance or entailing major change: a book that underwent fundamental revision.

Physics.

Of or relating to the component of lowest frequency of a periodic wave or quantity.

Of or relating to the lowest possible frequency of a vibrating element or system.

Having the root in the bass: a fundamental chord.

Something that is an essential or necessary part of a system or object.

The lowest frequency of a periodically varying quantity or of a vibrating system.