Quirk refers to an unusual habit or way of behaving. It can also refer to something strange that happens by chance, as in “a quirk of fate.”

// For an icebreaker, we were each asked to share a noteworthy quirk about ourselves. Mine was that I have to make sure every square of my waffles is buttered evenly before I eat them.

Everything that irritates us about others can lead us to an understanding of ourselves.

1. so lacking in interest as to cause mental weariness

2. using or containing too many words

daily.

Signet refers to a seal used officially to give personal authority to a document in lieu of a signature, or to the impression made by or as if by such a seal.

// The ring had been passed down for generations, and bore an intricate intaglio signet.

Gratuitous describes things that are not necessary, appropriate, or justified, as in "a gratuitous insult" or "a gratuitous assumption." Gratuitous can also mean "free."

// The film was criticized for its gratuitous violence.

// A local veterinary technician provides gratuitous services to the animal shelter twice a month.

Someone or something described as acquisitive is characterized by a strong desire to own or acquire more things.

// The game aims to teach middle schoolers to balance their acquisitive instincts with a consideration of what will benefit society as a whole.