Lash

Lash is a versatile English word with several distinct senses in anatomy, daily language, and nautical usage. As a noun, it often refers to a hair on the edge of the eyelid; as a verb, it can mean to strike with a whip, to attack verbally, or to secure something with rope. In different contexts, lashing conveys binding, protection, or force.

In anatomy, an eyelash is one of the short curved hairs along the edge of the eyelid. Eyelashes help protect the eye from dust, particles, and moisture. They are made of keratin and grow in cycles that include anagen (growth), catagen (transition), and telogen (rest). Humans typically have more upper eyelashes than lower ones, and individual length and density vary with genetics, age, and health. Cosmetic use, including mascara or lash extensions, is common but should be approached with attention to eye hygiene and irritation risks.

As a verb, lash means to strike with a whip or similar instrument, or to lash out, meaning to attack with words or actions. It can also mean to fasten or secure with a rope, cord, or strap. This last meaning is common in nautical and cargo-handling contexts, where to lash a load or a ship means to bind it firmly to prevent shifting during movement. The corresponding noun lashings refer to the cords or straps used for this purpose.

Lash appears in various compound forms and phrases, reflecting its broad range of meanings—from the biological feature on the eyelid to the actions of binding, striking, or criticizing.