A euphemism is a mild or pleasant word or phrase that is used instead of one that is unpleasant or offensive.

// The HR department advises using the euphemism “let go” instead of saying that someone was fired.

Ostentatious describes someone or something that displays wealth, knowledge, power, etc., in a way that is meant to attract attention, admiration, or envy. Things that are ostentatious tend to stand out as overly elaborate or conspicuous.

// The resort town is famous for its extravagantly expensive summer homes, which some tourists view as impressive and others merely ostentatious.

To meander is to follow a winding or intricate course—that is, one with a lot of turns and curves—or to walk slowly without a specific goal, purpose, or direction.

// We spent the afternoon meandering around the seaside town.

// The river meanders through the canyon.

Immutable is a formal adjective used to describe something that is unable to be changed.

// It is hardly an immutable fact that cats and dogs are sworn enemies; over the years our golden retriever has grown both fond and protective of her tabby housemate.

Calculus refers to an advanced branch of mathematics that deals mostly with rates of change and with finding lengths, areas, and volumes. The word can also be used more broadly for the act of calculating—that is, estimating something by using practical judgment, or solving or probing the meaning of something.

// By my calculus the more efficient air conditioner will have paid for itself within a span of five years.

Ramshackle describes things that are in a very bad condition and need to be repaired, or that are carelessly or loosely constructed.

// Toward the back of the property stood a ramshackle old shed.

// The book had a ramshackle plot that was confusing and unbelievable.

To stipulate is to demand or require something as part of an agreement.

// The rules stipulate that players must wear uniforms.

A behemoth is something of monstrous size, power, or appearance. Behemoth (usually capitalized) is also the name of a mighty animal described in the biblical book of Job.

// The town will be voting on whether or not to let the retail behemoth build a store on the proposed site.

Winsome describes people and things that are cheerful, pleasant, and appealing.

// Though a relative newcomer to acting, Maya won the casting directors over with her winsome charm, which was perfect for the role of the plucky young superhero.

// Our winsome guide put us at ease immediately.