tap / space
Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From busy + -ness; the ⟨y⟩ (-y) is kept to distinguish from business (of which it is a doublet), which is derived from the same two morphemes but by regular spelling rules.
hum
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tap / space
Classic usage
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