Difficult and Fundamental

Difficult adjective - Requiring considerable physical or mental effort.

Fundamental and difficult are semantically related. In some cases you can use "Fundamental" instead an adjective "Difficult".

Nearby Word: difficulty

Fundamental adjective - Of or relating to the simplest facts or theories of a subject.

Difficult and fundamental are semantically related. Sometimes you can use "Difficult" instead an adjective "Fundamental".

Nearby Words: fundamentally, fundamentalist, fundament, fundamentalism