Difficult and Unrelaxed

Difficult adjective - Requiring considerable physical or mental effort.

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

Nearby Word: difficulty

Unrelaxed adjective - Nor relaxed.

Difficult and unrelaxed are semantically related in forced topic. You can use "Difficult" instead an adjective "Unrelaxed".