공 (공) gong

While 'yeong (零)' is the formal expression, 'gong' is used in phone numbers. '010' = 'gong il gong'. It sounds awkward when foreigners use 'yeong' to read out a phone number.

◆ fandom_shipping — While its literal root means 'zero' or 'ball,' in fandom spaces *gong* is shorthand for the powerhouse half of a ship—the one who initiates, protects, or emotionally breaks the *su* (the bottom). If you use this outside of webtoon, fanfic, or BL culture, people will assume you're talking about sports equipment or a void, but within fandom, it's a foundational structural law of shipping. Learners often mess up by translating it as a generic 'boyfriend' or mixing up the directional dynamic of *gong* and *su*.

◆ sports_zero — Textbooks love to teach that '공' simply means 'ball' or 'zero,' but in athletic and competitive contexts, it lives inside a much harsher idiom: '공치다' (to hit nothing / to strike out). When a team or player works hard only to end up with literally nothing to show for it—or when an anticipated win turns into a humiliating shutout—natives reach for this root. It carries the weight of wasted sweat and dashed hopes, far removed from the sterile neutrality of mathematical zeros.

◆ public_sphere — When natives see '공-' slapped onto the front of a noun, they immediately shift gears from personal to systemic. It signals transparency, state backing, or corporate legitimacy—you aren't just talking anymore; you're on the record. Learners often confuse this formal institutional marker with everyday words for 'open' or 'together,' missing the bureaucratic weight and solemnity it instantly injects.