Which word refers to a physical quality marked by effortless grace?

The term that specifically denotes a physical quality characterized by effortless grace is "lithe." This word is often used to describe someone who is agile and flexible, moving with a lightness and fluidity that suggests ease and elegance. It originates from the Old English word "lyth," which means "to be supple or agile." In contexts such as dance, athletics, or even daily movement, being lithe implies a natural gracefulness that is both appealing and harmonious.

In contrast, the other choices refer to entirely different concepts. "Lechery" pertains to excessive sexual desire, typically associated with lustfulness and is irrelevant to physical grace. "Languid" describes a state of weakness or fatigue, often implying a lack of energy rather than gracefulness. Lastly, "libel" refers to a false and defamatory statement about someone, which is a legal term and not connected to physical qualities at all. Understanding these distinctions helps to clarify the meaning of "lithe" as the embodiment of gracefulness in movement.