Something described as convoluted is very complicated and difficult to understand, or has many curves and turns.

// The speaker’s argument was so convoluted that most of the audience had trouble determining whether they were for or against the new policy.

// The route from the airport to the village was long and convoluted.

Argot is language particular to a specific group. It can mean a kind of slang, a technical language or a code. In high school, only those who spend their time studying computer manuals could understand the argot of the computer lab kids.

Alacrity refers to a quick and cheerful readiness to do something.

// She accepted the invitation to go on the trip with an alacrity that surprised her parents, who had assumed she wouldn’t be interested.

Decimate can mean both “to destroy a large number of (plants, animals, people, etc.)” or “to severely damage or destroy a large part of (something).”

// The bay’s lobsters have been decimated by disease.

// Budget cuts have decimated public services throughout the state.

Travail is a formal word, usually used in the plural, that refers to a difficult experience or situation.

// The book describes the political travails of the governor during her first year in office.

Ostensible is used to describe something that seems or is said to be true or real, but is possibly not true or real. In other words, it is plausible rather than demonstrably true or real.

// The ostensible purpose of a filibuster is to extend debate, but in reality, it is used to delay or prevent action.

Slough is a formal verb used for the action of getting rid of something unwanted. It is usually used with off. Slough can also mean "to lose a dead layer of (skin)" or "to become shed or cast off."

// The editorial urges the mayor not to slough off responsibility for the errors in the report.

// The exfoliating cleanser promises to gently slough away dead skin cells.

Bodacious is used as an informal synonym of remarkable and noteworthy, as well as sexy and voluptuous. In some dialects of the Southern and Midland US, bodacious is used in its oldest meaning: "outright, unmistakable."

// The bodacious decor of the boutique hotel is intended to appeal to the young and the hip.