Jerkwater means “remote and unimportant.” It is often used to describe a small town, village, etc., that is out in the country far from cities. Jerkwater can also mean “trivial.”

// I grew up in a jerkwater town in the middle of nowhere.

To rue something is to feel penitence, remorse, or regret for it. Rue is often used in the phrase "rue the day."

// I rue the day I signed that infernal contract.

Heinous describes things—such as acts, deeds, or crimes—that are hatefully or shockingly evil, or in other words, deserving of hate or contempt.

// The former dictator will stand trial for the role he played in his government’s heinous treatment of political dissidents.

Approbation is a formal word that refers to praise or approval.

// Their plan to rewild portions of the city’s parks has won the approbation of the mayor.

By and large is another way of saying "in general" or "on the whole."

// By and large, I like the way things have gone.

The word dally has a number of meanings. To dally can be to physically linger or dawdle, or to waste time. Dally may also mean "to act playfully," especially in a romantic sense, or "to deal with something lightly or in a way that is not serious."

// Three members of the hiking group were dallying and didn't arrive at the overlook until others were already starting to head back to the trailhead.

// Alton has been dallying with the idea of starting a bakery.

A nebula is a large cloud of interstellar gas or dust. In nontechnical use, the word nebula also refers to a galaxy other than the Milky Way.

// We were eventually able to see the nebula through the telescope.

Liminal is a formal word most often used to describe an intermediate state, phase, or condition. It can also describe something that is barely perceptible or barely capable of eliciting a response.

// The essay presents an image of the border region as a liminal zone where one culture blends into another.

Callow is a synonym of immature used to describe someone, especially a young person, who does not have much experience and does not know how to behave like an adult. Like the word immature, callow is often used disapprovingly.

// The novel’s plot involves a callow youth who eventually learns the value of hard work and self-reliance.