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Tap any rung for its meaning.
Two stepping stones: the S (rung 1, for gloss) and the C (rung 3, for class) — each borrowed to keep a rung a real word, then given back before the end. There may be several par routes — the census above shows which ones climbers actually took.
Third-person singular of glow: to shine with a steady warm light.
From Old English 'glowan,' meaning to glow or burn, from a Germanic root shared with German 'glühen,' to glow. The word suggests steady, radiant warmth rather than a flickering flame. It has kept this meaning consistently throughout its history in English.
Full entry on Wiktionary ↗A long, flat piece of sawn timber.
Plank came into English from Old North French 'planke,' itself from Latin 'planca,' meaning a board or slab. It is related to the word 'plane' in the sense of a flat surface. The word has been used in English since the medieval period.
Full entry on Wiktionary ↗Definitions give each word’s most common meaning — the full entries live at Wiktionary.