Extremely large or great in size, extent, or degree.
Immense
Liable to change rapidly and unpredictably, especially for the worse.
Volatile
Giving good value in relation to the amount of money, time, or effort spent.
Economical
Too long, slow, or dull; tiresome or monotonous.
Tedious
Utterly furious, outraged, or violently angry.
Infuriated
Full of danger or risk.
Perilous
Drained of physical or mental strength; completely spent.
Exhausted
Using or expressed in more words than are needed; wordy.
Verbose
Exceptionally happy, proud, or elevated in spirits.
Ecstatic
Fearless, adventurous, and bold (often used to describe explorers).
Intrepid
Made poor; reduced to poverty.
Impoverished
Without any imperfections, defects, or errors; perfect.
Flawless
Extremely small; tiny.
Minuscule
Easily broken, damaged, or destroyed; delicate.
Fragile
Having a great deal of money; wealthy.
Affluent
Generous, kind, and forgiving, especially toward a rival or less powerful person.
Magnanimous
In a state of low spirits from loss of hope or courage.
Despondent
More important than anything else; supreme.
Paramount
Extremely high or unreasonable (usually referring to prices, fees, or demands).
Exorbitant
Open to more than one interpretation; having a double meaning or unclear.
Ambiguous
Found or existing everywhere; constantly encountered.
Ubiquitous
Standing out so as to be clearly visible; attracting notice or attention.
Conspicuous
Unreasonably determined to especially not change one's mind or position; stubborn.
Obstinate
Not openly acknowledged or displayed; secret or hidden.
Covert
Expressed clearly and easy to understand; rational or sane.
Lucid