Webster's Revised Unabridged Dictionary · 1913

Difficult

Difficult , adjective

[From Difficulty.]

1.
Hard to do or to make; beset with difficulty; attended with labor, trouble, or pains; not easy; arduous.
There is not the strength or courage left me to venture into the wide, strange, and difficult world, alone. — Hawthorne

Difficult implies the notion that considerable mental effort or skill is required, or that obstacles are to be overcome which call for sagacity and skill in the agent; as, a difficult task; hard work is not always difficult work; a difficult operation in surgery; a difficult passage in an author.

2.
Hard to manage or to please; not easily wrought upon; austere; stubborn; as, a difficult person.

Difficult , transitive verb

To render difficult; to impede; to perplex. [Rare] — Sir W. Temple