tap / space
Classic usage
Pronunciation: /ˈɛɹˌ(h)ɛd/
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From air + head (“foremost, topmost, or leading part”), sense 1 (“area of hostile territory seized for use as an airbase”) by analogy with beachhead and bridgehead.
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tap / space
Classic usage
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