Image via WikipediaBut you can also be anxious if you're just very eager. This is one of those "disputed" usages. Many grammarians will swear up and down that anxious cannot and should not be used to mean eager, but a closer look at where this proscription comes from reveals some surprising facts.
According to Merriam-Webster's Dictionary of English Usage (pp.101-104), the proscription against using anxious to mean eager started in America at the beginning of the twentieth century. This "rule" first appeared in print in "The Black List" in Write It Right, from that curmudgeonliest of grammar curmudgeons, Ambrose Bierce, though his explanation is unexpected:
Anxious for Eager. "I was anxious to go." Anxious should not be followed by an infinitive. Anxiety is contemplative; eagerness, alert for action.No other source bears out the idea that anxious shouldn't be followed by an infinitive, and before Bierce, using anxious to mean eager wasn't uncommon, especially in Great Britain.
- From Jane Austen's Pride and Prejudice, published in 1814: "We are not rich enough or grand enough for them; and she is the more anxious to get Miss Darcy for her brother, from the notion that when there has been one intermarriage, she may have less trouble in achieving a second . . . "
- From Lord Byron's "Don Juan," the first cantos of which were published in 1819: "His manner was perhaps the more seductive, / Because he n'er seemed anxious to seduce . . . "
- From Anthony Trollope's The Macdermots of Ballycloran, published in 1847: "[Mr. Webb] was, moreover, a kind-hearted landlord — ever anxious to ameliorate the condition of the poor — and by no means greedy after money, though he was neither very opulent nor very economical."
- From Sense and Sensibility (1811): "He had just compunction enough for having done nothing for his sisters himself, to be exceedingly anxious that everybody else should do a great deal . . . "
- From A Tale of Two Cities (1859): "Defarge gave into his anxious hand, an open scrap of paper. It bore the words in the Doctor's writing. . ."
- From Old Wives' Tale by Arnold Bennett (1908): "'Oh, but you must tell me, doctor,' Constance insisted, anxious that he should live up to his reputation for Sophia's benefit."
The history of and controversy about anxiety and anxious isn't really all that interesting -- at least, it didn't seem that way when I started writing this. I bring it up for another, personal reason, though. The word nerd portion of this post is finished. After the break is a more personal look at what anxiety is to me.