fiber
/ˈfaɪ.bə/
The word evokes a sense of linearity and strength through thinness. Whether referring to a physical thread, a biological structure, or a technological cable, the common image is a long, slender strand that gains power when bundled together. In a nutritional context, it carries a health-conscious connotation, associated with wellness, digestion, and "roughage" from plant sources. When applied to human character ("moral fiber"), the word shifts from a literal material to a metaphorical one. It suggests a structural integrity of the soul—the idea that a person is "woven" from strong, resilient materials that prevent them from collapsing under pressure.
Countable when referring to a single physical strand like a piece of cotton or a glass cable ('a synthetic fiber'). Uncountable when discussing nutrition in your diet ('eating more fiber') or the strength of one's character ('moral fiber').
💬Casual Conversation
Ugh, feeling super backed up today. My body hates me.
Sounds like you need more fiber. Did you skip the oatmeal again?
Meanings
A thread or filament from which textile fabric is woven.
"Cotton is a natural fiber used to make clothing."
Dietary carbohydrates that are not digested by the human body, found primarily in plant foods.
"Whole grains and legumes are excellent sources of dietary fiber."
Collocations & Compounds
optical fiber
A thin strand of glass or plastic that transmits light signals.
The internet connection uses optical fiber technology.
carbon fiber
A strong, lightweight material made of carbon threads.
The car's body is made of carbon fiber.
dietary fiber
The indigestible part of plant foods, important for digestion.
Eating enough dietary fiber is crucial for gut health.
nerve fiber
A long, slender projection of a nerve cell, or neuron.
Damage to a nerve fiber can affect sensation.
fiber optic cable
A cable containing one or more optical fibers used for transmitting optical signals.
The telecommunication company installed new fiber optic cable.
Etymology
The word 'fiber' comes from the Latin word 'fibra', meaning 'thread' or 'filament'. It entered English in the late 14th century, initially referring to the fine threads of plants or tissues in the body. Its meaning expanded over time to include synthetic threads and materials, and eventually, in a metaphorical sense, to refer to character or constitution.