roughage

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

  1. noun coarse, indigestible plant food low in nutrients; its bulk stimulates intestinal peristalsis

Etymology

From rough (“not smooth; crude, unrefined”) + -age (suffix forming nouns with the sense of appurtenance or collection).

In classic literature

Synonyms

fiber

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